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     Preparative and Extinctive Porperty of Poly(methyl methacrylate-co-methacrylic acid)/Polystyrene Composite Particles
     聚(甲基丙烯酸甲酯—共—甲基丙烯酸)/聚苯乙烯复合微粒的制备及消光特性
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     poly (methyl methacrylate -co-methacrylic acid ) /polystyrene (P (MMA - MAA ) /PS )composite particles with microvoid morphology were prepared by soap-free seeded emulsion polymerization.
     采用无皂种子乳液聚合制备了具有微空腔形态的聚(甲基丙烯酸甲酯—共—甲基丙烯酸)/聚苯乙烯[P(MMA-MAA)/PS]复合微粒并讨论了形态形成原理。
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     d. and continued for 14 days.
     , 14d。
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     d. and continued for 14 days.
     14 d。
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Direct melting polycondensation and characterization of poly(?-caprolactone-co-lactic acid)
      
A kind of biodegradable material, poly(?-caprolactone-co-lactic acid) [P(CL-co-LA)] was synthesized via the direct melting polycondensation of lactic acid (LA) and ?-caprolactone (CL).
      
The influences of the polycondensation time, and the catalyst type on the intrinsic viscosity of P(CL-co-LA) were also investigated.
      
Taking advantage of living polymerization character, functional block copolymers PSt-b-P (MA-co-AGE) were prepared in the presence of PSt RAFT agent.
      
The effect of pH value on the electrostatic layer-by-layer self-assembly and the photo-responsive behavior of Poly{2-[4-(4-ethoxyphenylazo)phenoxy]ethyl acrylate-co-acrylic acid} (PEAPE) was studied.
      
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1. The conformity of the pattern of Cicindela anchoralis to what has been considered typical of the genus becomes in- telligible if the middle band, which is undoubtedly the most variable of the markings of this species, is assumed to have shifted forward and to have developed extensions both cephaled and caudad along the lateral margin and on the disc of the eIytron.2. The variation of the pattern is of the continuous type and proceeds in one principal direction. As expected, some in- dividuals depart from...

1. The conformity of the pattern of Cicindela anchoralis to what has been considered typical of the genus becomes in- telligible if the middle band, which is undoubtedly the most variable of the markings of this species, is assumed to have shifted forward and to have developed extensions both cephaled and caudad along the lateral margin and on the disc of the eIytron.2. The variation of the pattern is of the continuous type and proceeds in one principal direction. As expected, some in- dividuals depart from this main series, in one way or another and ten such sub-types have been recognized in this study. The range of variation is very considerable.3. The male sex is found to have a greater tendency to lose its pigmentation, and this fact is interpreted as indicating its having a more variable middle band.4. Mating between the different types is entirely at random, the frequency of any given combination is apparently a function of the abundance of the individuals in a given class.5. In describing the elytral pattern of this species, Chevrolat (1845) used these words: "vitta anchorali, cum lienola pone humerum (femina amplioribus); cupreis". He evidently had regarded as typical the pattern showing fullest pigmentation. The present study shows, on the other hand, that such a pat- tern, while most primitive, is not the most representative. The typical pattern is to be sought in Class Ⅳ, the model class. This last remark certainly has wider application and merits the consideration of taxonomists describing highly variable forms.

斑蝥科甲虫翅鞘色型之差異,在一部份種類中,極为顯著。本篇所論,根據中國种錨紋斑蝥,於廿二年夏採於厦門北岸,計雌雄九百餘個,內有交配者六十二對,所得結論如下: (一)本種色型,甚为異特。若以美人薛福特氏所立之本屬理想模式色型推解,則其中間淡色横斑,較为移前,其左右則向上下分枝成H形。 (二)此種色型之變異為連續式仝趨一主要方向,但依其變異之分岐,可别为十種副式色型,詳情已於西文中加以討論。 (三)雄虫翅鞘之中間淡色横斑變異較大,其深色紋斑之傾向於縮小亦因之較雌性为甚。 (四)兩性交配,与色型之差異,全無關係。 (五)大部份個數皆呈現中間色型。其趨向於兩極端者(深色或淡色特别發達者)乃屬少数。因此分類學者於記述变異極大之種類時,應发中間色型者為代表。

The differential equation for relaxation oscillation with external impressed e.m.f. is written as

张弛振动之代表算式为一非直线的二次微分方程式在数学上至今未获完全解答颇耳氏(Van der Pol)曾以半解算半作图之方法研究强弛振动,但方法仅能用於无外加控制电压之情形下故控制影响未能解说本文叙述用罗勃氏(A.A.Bobb)作图方法解析张弛振动之问题,自由振动与控制振动均可应用文中叙明通常之起始条件如何不适宜於作图及如何试设一边界条件而得正确之结果用此方法张弛振动之普通特性与频率减倍之现象,均能解说控制波与强弛振动波之相的关系,亦曾加以讨论所设对称的三次抛物线形之振动特性,未能完满解释偶谐控制波之控制功效

Thirty eighr lower levels, and seventy five higher levels of Ce II have been obtained. The analyzed array contains 925 lines which include a large number of stronger lines. The lowest level is believed to be df(1G°4)6s2G°31/2. It is also shown that the determination of g values, or the actual term designations, requires an extensive measurement of Zeeman effect.

本文得到CeⅡ之低能位三十八,高能位七十五。分析所得之排列表含有光谱线925条,多数之较强光 谱线均在其内。该光谱之最低能位,当属df(~1G_4~0)6s ~3G_(31)~0无疑。本文更指出欲测定每项之g值,或决定每项之真正命名,尚有待於Zeeman效应之精密测定焉。

 
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