查询词典 populations

In nitrogen-fixing populations this 'new' nitrate and nitrite can be derived from the assimilation of nitrogen gas.

这些自己"堆肥"的豆科植物还能在其根瘤中的共生细菌的帮助下固定大气中的氮，从而将氮循环的主要步骤综合在一种生物中。

The authors claimed, with no evidence, that "indigenous rhizobium bacteria populations were considered adequate for soybean nodulation".

作者在没有证据的条件下提出"土著根瘤菌的数量足以使大豆结瘤"。

The variability in the populations studied (e.g., combat, noncombat, recent traumatic experiences) leaves additional unanswered questions that must be addressed in large, randomized, controlled trials.

研究人群中的可变因素（如战斗的、非战斗的、新近的创伤体验）使得一些额外问题悬而未决，必需由大规模的随机对照临床试验加以解决。

Novel solutions by nurses represent avital element in efforts to address current and future global health challenges– challenges such as aging populations,HIV/AIDS,TB,malaria,an increase in noncommunicable diseases,poverty,inadequate resources and workforce shortages.

护士的解释代表了在解决现在和未来的全球健康挑战的一个关键点--挑战来自于人口老龄化、艾滋病、结核病、疟疾和越来越多的难以消除的疾病，例如贫困、不合理的财务分配和劳动力短缺。

Because of the nondirectional property of ionic bond and the fully delocalized property of pi electrons on carbon layers, translation will not change the electronic structure of carbon layers, resulting in that A-GIC and AE-GIC hare quite good lubrication as well. The electrons come from metals mainly transfer to the delocalized pi orbitals of carbon layers, and the increase of delocalized electrons will make metal graphite intercalation compound more electro-conductive than graphite itself. Because ionic bond between metals and carbon layers is weaker and its lattice energy is much less than that of typical NaCl crystal, so metals could be left from interlayers. The Mulliken populations of C-C in intercalation compounds are smaller than that of graphite, and the HOMO energy level of GIC is higher than that of graphite too. These Lead to that GIC will easier be oxidized.

由于离子键没有方向性，又由于碳层中的π电子是充分离域的，所以碳层不会由于平移而改变其电子结构，金属石墨层间化合物仍具有很好的润滑性；金属失去的电子主要转移到碳层的离域π轨道中，碳层离域电子增多使金属石墨层间化合物的导电性比石墨增强；金属与碳层间的离子键强度比较弱，其晶格能远小于典型的离子晶体，因而金属易从石墨层中脱出；金属石墨层间化合物中的C-C间Mulliken布居值小于石墨中C-C间的值，且金属石墨层间化合物的HOMO能级也高于石墨的HOMO能级，所以石墨层间化合物中的碳原子较石墨更易被氧化。

The major threat to health arises in nonimmune populations who may be forced to flee from a setting where malaria is not a problem to jungles, swamps, or other areas where malaria transmission is occurring and where they can contract the disease.

疟疾主要威胁不具有免疫力的人群，当这些人被迫从原本无疟疾的地区迁移到丛林，沼泽，或其它疟疾多发地时，他们就有可能感染上疟疾。

Many people in the region of great ethnic, religious and cultural diversity suggested that Sen. Obama will have a broader, more nuanced view of the world, which could help the U.S. better engage other nations -- especially countries with nonwhite and Muslim populations -- in diplomatic dialogue.

在具有多元化种族、宗教和文化背景的亚洲地区，许多人都认为奥巴马对这个世界的看法更全面、更细致，这有助于美国在外交对话中更好地处理同其它国家的关系，尤其是有色人种和穆斯林人口。

Obama will have a broader, more nuanced view of the world, which could help the U.S. better engage other nations -- especially countries with nonwhite and Muslim populations -- in diplomatic dialogue.

在具有多元化种族、宗教和文化背景的亚洲地区，许多人都认为奥巴马对这个世界的看法更全面、更细致，这有助于美国在外交对话中更好地处理同其它国家的关系，尤其是有色人种和穆斯林人口。

Small populations are more likely to become endangered as a direct or indirect result of normal population fluctuations.

小种群更易于由于直接或间接的日常种群波动的结果而成为濒危物种。

The life table analysis in the laboratory showed that there were no significant differences in survival rate, nympha duration, and fecundity between laboratory populations of aphids fed on Bt and non-Bt cotton.

对Bt棉在长江中游棉区对各种主要靶标及非靶标害虫影响的系统评价表明，在长江中游棉区种植Bt棉，将有助于控制该地区的棉铃虫和红铃虫的危害，减少棉田农药的使用次数，控制棉蚜的暴发，使棉田生态系统朝良性的方向发展。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。