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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Longitudinal sawn wood are usually selected as samples in the study of sound properties of a musical instrument board.
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The liver fibrogenesis was assessed using a digital image analysis instrument of Masson's trichrome stained sections.
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The dispersibility and electrophoretic mobility of these particles in tetrachloroethylene (TCE) have been investigated by laser particle size analyzer, static sedimentation and electrophoretic instrument.
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The morphology was characterized by scanning electron microscopy (SEM), and the average size and the size distribution were determined by a laser-size distributing instrument.
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Their cross sectional distribution patterns in relation to the river channel morphologies were examined by using ship-mounted ADCP (Acoustic Doppler Current Profiler) instrument.
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The relative dielectric constant εr and the dissipation factor tgδ of the PZT thin films were measured with an LCR meter and were found to be 158 and 0.04-0.005, respectively.
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The DTV positioning that has a sub-meter level ranging error and meter level positioning accuracy can parallel with and even taken as a beneficial substitute for the tradition positioning technology.
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Relay measurement method, which uses the kilogram-meter (KGM) measurement system to identify volumetric errors on the planes of computer numerical control (CNC) machine tools, is verified through experimental tests.
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As an example, the safe basins on the rolling initial value plane were constructed for a 30.27-meter-long fishing vessel according to different initial conditions and random wave parameters.
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The earlier classification list of automatic liquid metering systems is supplemented with universal output-open pressurized dosing machines, which meter liquids by time.
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In fluorescent quenching experiments, fluorescence changes were automatically recorded in real time by combining the Microlab 500 Series Dispenser and PTI fluorescence apparatus.
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We found a new structure named solicitation speckle at the low latitude of the animal pole and near the micropylar apparatus between the ovum envelope and cell membrane in the zygote of fish.
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At the same time, the same thing happened near the micropylar apparatus before cortical reaction.
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Both starting points encountered and healed up at the vestibule of the micropylar apparatus.
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The pressure drop of a cross-flow moving-bed was investigated in a two-dimensional rectangular apparatus.
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| | The absorption band of water vapor at 0.94 μ is studied photographically by means of a concave grating spectrometer. Twenty eight component lines are observed and measured on a comparator as well as on a Moll microphotometer. This band shows something of a doublet form which suggests that the H2O molecule has a triangular form with the oxygen atom at the vertex of an obtuse angle. The lines agree closely with some of the absorption lines in the solar spectrum as measured by Abney in 1880. | | 前之研究红外光谱者类多依赖热电堆以测定光谱内光能之分布。吾人咸知红外带状光谱之接近可见部分者,其成分线排列甚密。若用热电堆万难分析而得其细微组织。作者所考察之光谱正在红外照相片感光范围之内,故得测定水汽带状光谱内各成分线之波长而具有1内之准确度。 作者所用分光仪器为一凹面光栅,其曲度半径为2公尺。该光栅面上每厘米划有线6000根,颇适合红外光谱之探讨。所用光源为一1000流明之电灯泡泡内有一一字形线圈灯丝,其所发之光穿过2公尺之105°—110℃水汽而交聚在分光仪之缝上。红外照相片经氨溶液之超度敏化后,即安置於已经配准之相片匣内,而使之感光。光之可见部分系用深红滤片割除。照光时间约 费四五十小时,然后除去滤片,照以水银光谱凡数秒,作为决定波长之标准。 用前法所摄得之光谱大都不十分清晰,其主要原因系由水汽管之太短。但用显微光度计量之,各成分线之波长不难准至1(?)范围以内。本实验所得各线若与五十年前Abney所测定太阳光谱中0.94μ附近之吸收线相比较,可见太阳红外光谱中许多吸收线系由大气中水汽所产生,而证实Abney最初之推想。惟本实验所测定之吸收线与Abney所测定太阳光谱中之对应黑... | | 文摘来源 | | Thaumapsylla breviceps Roths. 1907, a fruit-bat flea, is recorded here forthe first time from China. A pair of the flea sent to us for identification wascollected from Feng-I, Yunnan, off a bat which was neither identified norpreserved. A search of literature reveals that there has been no definite recordof the presence of fruit-bats in Yunnan,though Allen did predict their presencein that Province. Hence the present record of the particular flea gives furtherlight on the fauna of Yunnan. A short descriptio... | | 本文记录了在云南凤仪采集的蝠蚤是短头怪蝠蚤(Thaumapsylla brevicepsRoths.1907)。虽然宿主未能订名,但因为这是食果蝠类的跳蚤,因此肯定了食果蝠在云南的存在。 因为这是短头怪蝠蚤在我国的第一次记录,所以对其鉴别特点加以技术。 | | 文摘来源 | | Nous racontons d'abord l'histoire des catalogues stellaires en la divisant à trois ǎpoques selon les instruments utilisés pour achever le travail: 1° l'époque de l'alidade munie de pinnules et de la clepsydre, 2° l'époque du cercle méridien et de la pendule sidérale et 3° l'époque de l'équatorial photographique. Nous montrons le fait que beaucoup de découvertes importantes de l'Astronomie sont obtenues de la compilation des catalogues stellaires. Nous passons en revue des catalogues importants tels que B. D... | | 這篇文章先敘述星表编制的歷史,以編製星表所用的仪器,分為三个時期,即牆仪漏壺時期,子午仪恆星钟時期与赤道仪照相时期;且說明天文學上許多重要发見均由编制星表得來。其次對重要星表如B.D.,A.G.C.,C.d.C.耶魯等星表,基本星表如鮑斯星表,FK3星表,以及開普泰因選面積計划均加以簡單的介绍。本文第二段對苏联在第八届國際天文學會提议要编制的微星星表加以详细的敘述,并說明佘山觀象台可能参加的項目和我們的希望。 | | 文摘来源 | |   | | << 更多相关文摘 |
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