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有效年限
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  effective limit of years
     The effective limit of years of seed vitality of trees was obtained through examination of many years;
     经多年试验观测 ,得出各树种种子保持生活力的有效年限 ;
短句来源
  “有效年限”译为未确定词的双语例句
     Experiments of effective storage limit of years of Pinus tabulaeformis and other common seeds of trees
     油松等常用林木种子贮藏有效年限的试验
短句来源
     While determine the current density, take the lifespan of cathodic protector into consideration.
     随着涂层破损率的升高,所需保护电流密度提高,因此在选定保护电流密度时也需要将阴极保护的有效年限考虑在内。
短句来源
     Tillage location test and its cooperative test in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.
     在小麦、玉米一年两熟制农田上,进行耕法定位及配合试验,试验表明,耙茬少耕的有效年限为1~2年。
短句来源
     In Jiyang depression,the locations of exploration well given by3D seismic allow useful-life possible about 5years.
     在济阳坳陷中,三维地震提供探井井位的有效年限大致在5年左右。
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     Since 1993, constructions of platform at sea in Gudao have been completed and they have gone into running, but along with time going, time limit of design of platform will arrive, disassembly has been put into the order of the day as a burgeoning high technique under the attention and study.
     1993年以来,胜利埕岛油田海上平台设施已具备相当规模,但随着时间的推移,平台设施已相继进入设计有效年限中后期,平台拆除提上了议事日程,平台拆除做为一门新兴的高技术产业正逐渐引起人们的关注和研究。
  相似匹配句对
     Promote Employment Effectively by Reducing Ceiling Age of Work
     缩短工作年限有效促进就业
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     THE EXPLORATIO ABOUT EFFECTIVELY LENGTHENS SERVICE LIFE OF THE MINE
     有效延长矿山服务年限的探索
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     Chemotherapy was effective.
     化疗有效
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     Effective teaching
     有效教学
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     Sow longevity
     母猪的利用年限
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  useful life
The exclusion of an additional separation stage made it possible to reduce twofold the time of analysis of a single sample, to save expensive materials necessary for carbohydrate HPLC, and to increase the useful life of the analytical column.
      
Strategies to stabilize and contain antibiotic resistance in local areas can succeed in prolonging the useful life of antibiotics.
      
The deterioration of the anion resin was controlled by simple precautions and thus its useful life was substantially prolonged.
      
Inbreeding may be a useful tool in minimising the effects of laboratory adaptation, thereby extending the useful life of a strain.
      
The items in the inventory have a useful life time characterised by an Erlangian distribution.
      
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Tillage location test and its cooperative test in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.The conventional mouldboard ploughing before planting wheat in autumn can be replaced by an alternate tillage system,disc ploughing for 1-2 years+mouldboard ploughing or deep chiselling for one year.The new tillage system can save time and energy,reduce the cost,im- prove soil fertility and increase yields.Summer maize can be cropped by no-tillage...

Tillage location test and its cooperative test in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.The conventional mouldboard ploughing before planting wheat in autumn can be replaced by an alternate tillage system,disc ploughing for 1-2 years+mouldboard ploughing or deep chiselling for one year.The new tillage system can save time and energy,reduce the cost,im- prove soil fertility and increase yields.Summer maize can be cropped by no-tillage system.

在小麦、玉米一年两熟制农田上,进行耕法定位及配合试验,试验表明,耙茬少耕的有效年限为1~2年。秋季麦前耕作可实行耙茬少耕1~2年、翻耕或深松1年的轮耕制。轮耕制较连年翻耕具有高效、争时、节能、降本、护土、增产的效果。夏玉米可免耕种植。

Airborne geophysical data are of relatively high preservation and development value. As tapes can only be preserved for a relatively short period, there exists the danger of losing data obtained from aerogeophysical survey. The transcription of airborne geophysical data with laser discs will solve this problem and create favorable conditions for the development and utilization of airborne geophysical data at a higher level.The disc data can be read out from any laser disc driver compatible with RICOHRS-5060E...

Airborne geophysical data are of relatively high preservation and development value. As tapes can only be preserved for a relatively short period, there exists the danger of losing data obtained from aerogeophysical survey. The transcription of airborne geophysical data with laser discs will solve this problem and create favorable conditions for the development and utilization of airborne geophysical data at a higher level.The disc data can be read out from any laser disc driver compatible with RICOHRS-5060E type laser disc driver.

航空物探数据具有较高的保存开发价值 ,由于磁带保存的有效年限较短 ,航空物探勘查所获资料存在着丢失的危险。航空物探数据光盘转录将解决这些难题 ,为航空物探资料的二次开发和利用创造条件。本光盘数据从任一与RICOHRS - 50 60E型光盘机兼容的光盘机上均可读出

The sand hazards is mainly depended on co operation of the factors of dynamical system-wind power and echo system-ground surface state. Along the Desert Highway the types of aeolian geomorphology are complex and various, and rich in sand supplies. The sand driving wind has high frequencies and durative action. So the sand controlling has sheer difficulty. The "prevention stabilization" system which combined with the upright reed sand blocking fences and 1m×1m semicovered reed checkerboard barriere has being...

The sand hazards is mainly depended on co operation of the factors of dynamical system-wind power and echo system-ground surface state. Along the Desert Highway the types of aeolian geomorphology are complex and various, and rich in sand supplies. The sand driving wind has high frequencies and durative action. So the sand controlling has sheer difficulty. The "prevention stabilization" system which combined with the upright reed sand blocking fences and 1m×1m semicovered reed checkerboard barriere has being set controlling the sand hazards effectively. But some problems exist still. The results of survey of fixed site show that along Desert Highways the direction of effective wind and sand transport are fasten on NE,ENE,E. They account for 46%-68% of the total. Theoretically on the windward side's (east side of the road lines) protecting intensity should be strengthened, but in fact, strong wind erosion and sand deposition inner the stabilizing belts made the relationships of effective duration and its width indistict. Hence, the principle of narrow width and maintain frequent should be adopt, the width on the windward side controlls within 30-40m, resets every 3-4 years and maintains in time. The leeward side may not set upright fence, the width of stabilizing belts is suitable to be controllde within 10-15m. The width of blank belt between upright fence and the semi covered checkerboard fence is suitable to be controlled within 8H. Accounting to degree of sand hazards, using sole reed fixed fence, the mobility fence of double sandbag block and combined fixed fence with mobility fence will strengthen sand protecting intensity at the fore edge. By using technics such as setting different standard and height of semi covered checkerboard fence in different location, solid slope of road shoulder and creating sand transporting section ets, and forming the solid control system, sand hazards could be controlled sufficiently.

沙害主要取决于两个系统因素的共同作用 :动力系统—风力和响应系统—下垫面状况。塔里木沙漠公路沿线风沙地貌形态类型复杂多样 ,沙源充足 ;起沙风频数高 ,作用时间长 ,防沙难度极大。已建成的高立式芦苇阻沙栅栏和 1 m× 1 m半隐蔽芦苇草方格固沙沙障结合的“阻固”体系 ,有效控制了沙害 ,但也存在一定问题。定位观测表明 ,沿线起沙风和输沙方向集中于 NE、ENE、E三个方向 ,占 46%~ 68% ,从理论上说 ,应加大风侧 (路东侧 )防护力度 ,而实际上固沙带内部强烈的风蚀与沙埋过程 ,使其有效年限与设置宽度关系不明显 ,宜采取窄宽度勤维修原则 ,上风侧宽度控制在 3 0 m~ 40 m,每 3~ 4年更新一次并及时维修。下风侧可不设置高立式沙障 ,固沙带宽度控制在 1 0 m~ 1 5 m为宜 ;高立式沙障与半隐蔽方格沙障前沿之间空留宽度控制在 8H以内较为适宜。依沙害程度 ,以单一原状芦苇固定沙障、复膜沙袋阻沙体活动沙障及固定沙障与活动沙障有机结合加强前沿阻沙力度 ;不同沙害部位设置不同规格不同高度的半隐蔽方格沙障、固化路肩边坡创造输沙断面等技术 ,形成立体防护体系 ,足以控制沙害。

 
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