but highly polar or hydrophilic compounds are not easy to be extracted.

police say most of the casualties appeared to be pakistani police and private security guards posted outside of the compounds.

警方说，大多数伤亡者看起来是在大使馆外值勤的巴基斯坦警察和私营保安人员。

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a-fe2o3 (haematite) was one of the first compounds to be studied by neutron diffraction.

A-Fe2O3（赤铁矿）是中子衍射最先研究的化合物之一。6.The General says aircraft targeted five isolated compounds destroying at least three of them.发言人说飞机瞄准了五个孤立的据点，至少摧毁了其中的三个。

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the kind of these compounds and concentration in the heating season were higher than i. . .

这些污染物的种类和数量都是采暖期高于非采暖期。

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two internal glands at the bottom of their tails produce a thick and oily liquid made of particularly smelly chemical compounds.

它们尾巴根部的两个内腺会产生一种浓度高的油性液体，含有浓重臭味的化合物。

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expatriates, used to a secure if sequestered life, tried not to think about the tanks parked outside their compounds.

过去那些只要肯过隐居生活就可以确保其安全的流亡者，现在不得不考虑那些停在他们院子旁边的坦克。

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the design and synthesis of spiro compounds have been a focus in the field to obtain photochromic spiro compounds with better performance.

为了获得性能优良的螺环光致变色化合物，新的设计合成一直是该领域研究的热点。

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to boil such compounds, it is often better to lower the pressure at which such compounds are boiled instead of increasing the temperature.

要使这类化合物沸腾，最好是降低化合物沸腾时的压力而不是提高温度。

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stoichiometry: determination of the proportions (by weight or number of molecules) in which elements or compounds react with one another.

化学计量学：确定化学元素或化合物彼此反应的比例关系（用重量或分子数表示）。

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chlorinated aromatic hydrocarbons and their derivatives are the persistent organic compounds, which are toxic or not easy to degrade.

氯代芳烃及其衍生物是一类毒性强、难降解的持久性有机化合物。

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i think refining the compounds in terms of the balance of their activities is really key, but that's not to say that's trivial .

我认为，以平衡药物各项作用的方式来改进化合物的确是关键，但是这并非小事，它需要时间。

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the organic compounds unable to be synthesized under normal reaction can be fulfilled by means of umpolung.

在有机合成中一些不能用常规反应合成的有机化合物可以通过极性转换的方式来完成。

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the changing trends of total and reducing sugar contents were all opposite to that of n compounds.

总糖和还原糖含量的变化趋势均与含氮化合物的变化趋势相反。

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carbide: inorganic compound, any of a class of chemical compounds in which carbon is combined with a metal or semi metallic element.

碳化物：碳与金属或半金属元素化合而成的一类化合物的总称。

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and (2) an ion exchange step in which at least the acid catalyst of acidic compounds is removed by an anion exchange resin.

离子交换工序，通过阴离子交换树脂至少除去酸性化合物中的酸催化剂。

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the known, and yet to be discovered, synergistic compounds found in food and necessary for proper nutrient delivery.

已知的，但尚未被发现，在食物中发现的化合物，并进行适当的协同提供必要的营养。

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this technique is often used for compounds which are unstable at high temperatures.

这项技术常常用于高温下不稳定的化合物的蒸馏。

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hundreds of compounds, including antioxidants, seem to be responsible for coffee's many protective benefits.

咖啡中含有包括抗氧化物在内的上百种化合物，这似乎就是咖啡有益于健康的原因。

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though by no means the only factors in halitosis , the volatile sulfur compounds produced by bacterial metabolism are a prime suspect.

细菌代谢所产生的挥发性硫化物，虽不会是造成口臭的唯一凶手，但却是主嫌。

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but, since the late 1700s, compounds of the metal have also been used to treat leukaemia.

但是从十八世纪后期，金属配合物就用来治疗白血病。

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and there must be simple substances, since there are compounds; for a compound is nothing but a collection or aggregate of simple things.

由于存在复合物，因此必然存在单纯物，所谓复合物，即单纯物的集合。

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