使不能

In practice, some teachers and school staff have little knowledge of theory and practice of English language testing and thus are unable to ensure test reliability and validity.

实践中，由于教师和教学管理人员在语言测试方面存在的模糊认识，往往使测试的信度和效度得不到应有的保证，从而使测试不能全面反映教学情况。

It was now the Month of December, as I said above, in my twenty third Year; and this being the Southern Solstice, for Winter I cannot call it, was the particular Time of my Harvest, and requir'd my being pretty much abroad in the Fields; when going out pretty early in the Morning, even before it was thorow Day-light, I was surpriz'd with seeing a Light of some Fire upon the Shore, at a Distance from me, of about two Mile towards the End of the Island, where I had observ'd some Savages had been as before; but not on the other Side; but to my great Affliction, it was on my Side of the Island.

前面我已说过，这是我在荒岛上的第二十三个年头了。当时正是十二月冬至前后。当然，这儿的十二月，根本不能算是冬天，但对我来说，这是收获庄稼的特殊季节。我必须经常出门到田里去。一天清晨，天还未大亮，我就出门了。忽然，只见小岛尽头的海岸上一片火光，那儿离我大约有两英里远。这使我惊恐万分。那儿我也发现过野人到过的痕迹。但使我更苦恼的是，火光不是在岛的另一边，而是在我这一边。

The expression of Bcl-2 was weak or negative; there is no difference among various groups.Research Conclusion: lCadmium can accelerate the apoptosis of GCs and is related with dose; 2Cadmium accelerate atresic of follicular; and increase the number of interstitial gland;3Cadmium enhance the expression of bax, and no affect obviously on bcl-2;4 Selenium restrained the effect of cadmium-induced apoptosis on granulosa cells, but it cant be interdicted completely.

实验结论：1 镉能促进小鼠卵巢颗粒细胞凋亡，并具有剂量效应关系。2 镉能促进卵泡闭锁，使卵巢间质腺数量增加。3 镉能增强颗粒细胞凋亡相关基因bax的表达，对bcl-2的表达则无明显影响。4 硒具有一定的抑制镉致颗粒细胞凋亡的作用，但不能完全阻断。

Talking may aggravate women, but can hardly make knives sharper, fire hotter, or rifles sartain.

用嘴可以激怒一个女人，可是嘴皮子不能使刀子变得更快，使火烧得更旺，或使枪打得更准。

The results showed the addition of PPS did not decrease the thermal performance but decreases the heat deformation temperature of PPES/PPS blends. The crystallinity of PPS was hindered with the increasing of PPES contents, the crystal lattice flaws of PPS occurred and the perfect spherocrystal could not appear when the mass fraction of PPES was 80%. The annealing process was favorable to the increase of the heat deformation temperature and the formation of perfect spherocrystal of PPS.

热失重研究表明，在所组成范围内PPS的加入并未降低共混物的热性能，但使共混物的热变形温度有所降低；PPES的加入使PPS的结晶受到阻碍，当PPES质量分数达80%时，PPS产生了晶格缺陷，从而不能形成完善的球晶，退火过程有利於提高共混物的热变形温度，使PPS形成更完善的球晶。

According to anther abortion characteristics and hormone functions, it was suggested that IAA, GA3 and ZR deficiency might be associated respectively with the inhibition of starch grain accumulation, pollen mother cell and tapetal cell expansion and tetrad formtion, and that abortion and even death of pollen mother cells and tapetal cells in sterile anther might be accelerated by high ABA accumulation.

根据内源激素的功能推测，不育花药IAA含量过低使花药淀粉积累受阻，GA_3含量不足影响花粉母细胞和绒毡层细胞的膨大，过低的ZR含量使花粉母细胞不能分裂形成四分体，过高的ABA含量促进花粉母细胞退化和死亡。

The results of DLVO theoretical calculations indicate that the total acting energy between the titanaugite and ilmenite particles at pH 5.9 is negative, showing as attraction, which causes the superfine titanaugite particles attach on the surface of ilmenite. At pH 8.5, because of large electrostatic repulsion energy, the total acting energy shows as strong repulsion, thus the superfine titanaugite particles can not attach on the surface of ilmenite.

DLVO理论计算结果表明：当pH=5.9时，两种矿物颗粒间的总相互作用能为负值，表现为相互吸引，微细粒级的钛辉石会在钛铁矿表面上粘附，使钛铁矿的回收率显著降低；当pH=8.5时，由于静电排斥能大，总相互作用能仍表现为较强的排斥力，微细粒钛辉石不能粘附在钛铁矿表面。

S back be thrown on one's back behind sb.

on the back 一无所有；一贫如洗在记忆的深处，下意识地跟随某人；支持某人作为某事的主使者巴不得某人离开；希望摆脱某人卧病在床仰卧；卧病；毫无办法，一筹莫展成为某人的负担；不断地挑剔某人被摔倒两肩着地；被打得大败背着某人，背地里使其负担过重而不能胜任；使某人失败完成某事的最艰难部分；挫败；伤其要害使顶不住或忍不住把某事置之脑后，蔑视某事拍拍某人的肩膀表示祝贺或鼓励

Everything was new to me and I was fairly new to that scene. When I first got into the game, I just wanted to dunk everything I could. That's the first opportunity to really show the world on an elite stage what you can do. It was the most unbelievable feeling and it just makes you want to keep getting that feeling over and over again.

我激动到不能入睡，对我来说一切都是新的，而且在我面前的是一个全新的场面，当我第一次投入到比赛中，我想尽我的全部所能扣篮，能是第一次向在世界面前展示自己所能做的，这是最不可思议的感觉，而且他使你想一次又一次的保持这样的感觉。

The impacts of printing process and curing condition on antenna resistance are shown as follows: higher resistance of a printing antenna is generated not only by higher print pressure and velocity, which result in inadequate ink transfer, but also by lower curing temperature and shorter curing time, which can result in imperfect combustion of organic vehicles in silver ink.

印刷工艺与固化条件对天线电阻的影响主要表现在：较高的印刷速度与印刷压力会使银浆转移不充分，并导致天线电阻增加；而较低的固化温度、较短的固化时间也会使银浆中的有机载体不能充分燃烧，从而增加天线电阻。

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