一价

Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.

酰亚胺源自氨的一种化合物，含有与一个二价酸基或者二个一价的酸基结合的氨基

However, divalent metal cutions containing complexes were found to be stabilized significantly in the water solution.

一般的，一价金属阳离子在水中与DTP的反应情形与在气相中的相似，但二价金属阳离子在水中的产物更为稳定。

Their tribological performances were evaluated with a HQ-1 block-on-ring test rig and a four-ball machine.

一价铜盐和铁盐的性能较差与一价铜盐的歧化反应及它们对润滑油氧化的催化作用有关。

The result showed that the one-valence cationsaccelerate the hydration process of α-hemihydrate gypsum greatly because they improvethe dispersed degree of α-hemihydrate gypsum particles due to the remarkable effect ofincreasing theζpotential; the effects of bivalent and trivalent cations on ζpotentialdecrease in turn, compared with monovalent cations, the effects on both the disperseddegree of α-hemihydrate gypsum particles and the setting time of paste are little.

研究还表明：由于一价阳离子能较大程度地提高石膏浆体的ζ电位，因而有效地提高了石膏颗粒的分散程度，对α半水石膏的水化加速作用很大，而二、三价离子对石膏浆体的ζ电位影响依次减小，对半水石膏颗粒的分散程度和浆体凝结时间的影响均不如一价阳离子作用大。

A pyrimidine base, C5H6N2O2, that is an essential constituent of DNA.

一价的在酸碱反应中只有一个氢离子转移到碱上的；一碱价的

For two possible geometric structures,square and regular tetrahedron,the electronic structures of ground state and structure parameters of the O_4,O-_4 and O+_4 are calculated according to the principle of minimum energy.

计算了2种可能的空间结构——正方形和正四面体，分别得到了这2种结构的中性分子O4，正一价分子O+4和负一价分子O-4的基态电子结构，并根据能量最低原则确定了各自的结构参数，从而得到了O4分子2种结构的基态总能量、一价电离能及电子亲合势能。

Besides, it makes some modifications for the model and puts forward a new rule of multi-case variable substitution to solve the problems posed by the Chinese constructions called "JianYu", which are similar to the object control constructions in Chomsky's model of Principle and Parameter Theory.

同时，汉语一价动词、二价动词和三价动词的词项行为也是解释代词隐现的重要基础。本章验证了第四章解析模型中对汉语一般计算规则的限制条件，证明了对汉语词项行为的刻画是合理的。

Or or relating to salts or acids forming salts with two atoms of a univalent metal.

含有两个一价金属原子的盐类或酸类的，或者有关盐类或酸类的，它通过两个一价金属原子形成盐类

The mononuclear complex (5) and binuclear complex (2),(4),(7) also investigated via single crystal X-ray diffraction.

单核铜一价化合物(5)和双核铜一价化合物(2)、(4)及(7)已经由X-ray单晶绕射解出其分子结构。

However, there is no such restriction on the transformational forms, such as the Dative Construction in English and the sentence marked by "ba" in Chinese. The differences are: Chinese DOC has a more wide-ranging scope; Some verbs used in the Chinese DOC sentences are inherently one or two-place, but verbs used in the English DOC is at least inherently two-place, can't be one-place; some verbs bearing the same meaning can construct a DOC sentence in Chinese but not in English, and vice versa; there are differences on the form, the position and the ellipsis of the double objects; there are differences on the passive form of the DOC in both languages.

其不同点有：汉语的双宾结构范围更广；汉语中有的动词可能是一价或二价，但英语中的动词起码是二价，不可能是一价；有些具有相同意思的动词在汉语中可以构成双宾结构，在英语中则不能；反之亦然；在英汉语中，间接宾语和直接宾语的构成、省略及位置上都存在差异；英汉语的双宾结构的被动式形式存在差异。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。