成对的

Tracheids have heavily lignified walls and the only connection between adjacent tracheids is through paired pits, which are mainly concentrated in the end walls.

管胞的细胞壁高度木质化，相邻管胞之间的仅有的连接通过集中位于端壁的成对存在的纹孔。

The impact of "Historical Records" on "The Romance of the Three Kingdoms" can be shown in three aspects: First, cross reference in "Historical Records" is greatly used in the "The Romance of the Three Kingdoms"; Secondly, during composing "The Romance of the Three Kingdoms", the author's appraisal, love and hatred are outpoured naturally; thirdly, Like "Historical Records","The Romance of the Three Kingdoms" sticks to the principle of "Pen pen, sharpening sharpening" in choosing material.

其具体内容有三方面：一是《三国演义》创作过程中大量使用《史记》的互见法；二是《三国演义》写作过程中，作者的褒贬和爱憎意向并不通过发议论、作判断来表达，而是把这种主观倾向通过对人物形象的具体描写自然地流露出来，即寓论断於敍事；三是《三国演义》写作也像《史记》一样，准拟&成一家之言&的崇高目标，并在素材取舍方面做到了&笔则笔、削则削&。

The announcement itself—an alleged boost to parental power over local schools—may have been piffling, and certainly not enough to satisfy those still waiting for the visionary ideas promised by Mr Brown when he entered Number 10 two years ago.

这个声明本身――被指责成对施加在当地学校的家长制强权起到了推波助澜的作用――未免太小儿科，也远远不能满足那些憧憬着2年前布朗踏入唐宁街10号时许诺的改革构想的民众期待的心。

Analyzing the data from one-on-one interviews requires "breaking up","recomposing" and "concentrating", which are generalized as "organizing" and "connecting".

优秀的访谈只有通过优秀的分析才能将所收集的资料转换成对研究者有意义的结论，从而达到研究的目的。

Pipe heat causes linesr expansion and rurtherresult in tensile stress in the direction of pipe xale to make cracks in direction perpendicular to the axle,in the case ,the stress value is obtained by ormula=E,and if ,it is estimated with 15mm LG PEX-A Pipe as base,the sectional breaking rorce is estimated approx.7.6kg/cm2,being much more little comparing with the concrete bearing force=1,536kg/cm2and its not needed to be anxious to concrete cracking rising.

由于管子的线性热膨而使管子受轴向伸长力，从人在与管轴成直角的方向上产生裂缝，这时的应力接计算，PEX－A按直径15mm标准计算进断面破坏强度约为7.6kg/cm2，比混凝土的支持力1.58kg/cm2小得多，所以不需要考虑管子对混凝土的破坏作用。

When I am standing before Sun Liang's paintings at the times of sunset, I feel that the clear line gradually becomes obscure and changes to light and color. I often misinterpret them as some kind of unseen livings. I have no idea about these things. They seem to be these or those.

在许多个夕阳时分，我站在孙良的画前，那些确凿无疑的线条，逐渐幻化成模糊的一片光与色，我常将它们误认为某些我尚未见到过的生命体，对它们究竟为何物一无所知。

But the experts tell us that violence-prone cults often go through a kind of metamorphosis, where once righteous do-goodism and positive thoughts are transformed into a world-weary disgust and, often enough, a collective death wish.

法轮功也许跟描绘的一样无害，但专家告诉我们倾向暴力的邪教通常经过一个发展过程，一度是做善事会转化成对俗世的憎恶和很可能集体自杀的愿望。

Herein we mainly discuss the asymmetric addition of terminal alkynes to aldehydes and ketones using commercially available chiral pool and their derivatives.

这篇论文论述了商业化的手性源及其衍生物配体催化的末端炔对醛和酮的不对称加成反应的研究。

Segments produced clusters of somatic embryos from embryogenic calli or directly from root apical meristems , and that also can convert into bud directly in the different tissue culture conditions. Modified media B5 with 1.0 mg.L-1 2,4 - D and 3.0mg.L~1 6-BA is suit to induce calli, and 0.5 mg.L-1 NAA is fit for somatic embryos inducement from calli. 6-BA encreased direct somatic embryogenesis on root tip distinctly,but NAA is retard it. NAA also prolong the time of root-tip convert into bud directly.

在改良B_5(微量元素为原来的1／3)中加入1.0mg.L~(-1)2，4—D和3.0mg.L~(-1)6-BA对离体根尖的愈伤组织诱导较为合适，0.5mg.L~(-1)NAA有利于从愈伤组织上产生体细胞胚；6-BA明显促进离体根尖直接产生类原球茎，而NAA则有阻碍作用；同时NAA的存在也使离体根尖直接成芽的时间延长。

It is an important topic to analyze the polarization of Λ hyperons produced in deep inelastic scattering because the analysis can provide the mechanism of fragmentation from quark to hadron.

通过对e-p深度非弹过程中产生的Λ超子的极化分析来研究夸克碎裂成强子的机制是e-p实验的重要课题。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷