四元环 [sì yuán huán]
网络释义专业释义
... Fourier transform (FT) 傅里叶变换 four-membered ring 四元环; 四原子环 APELL 在地方一级知道和作好工业事故的准备 ...
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... 四元钢 quarternary steel 四元环 four-membered rings; tetra-atomic ring 四元基 tetrad ...
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four-membered ring - 引用次数：8
Because of the deceasing electron density of ringcritical point, the four-membered ring is weaker.
同时中心四元环的稳定性也在逐渐的减弱。
参考来源 - 桥联双金属配合物的理论研究square - 引用次数：3The structural analysis reveals that the stability is determined by the pyramidalization of B and N atoms at the square-square fusion.
同时,结构分析表明四元环相交顶点上的B、N原子锥化角决定了分子结构的稳定性。
参考来源 - 硼氮多面体分子的结构与稳定性研究 -
four-membered ring
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双语例句原声例句
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本文证明了在同构意义下四元环仅有十一个。
This paper prove that there are only eleven four—rings up to isomorphism.
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研究结果表明该异构化反应先形成一个四元环过渡态而后转变为产物。
The obtained results show the isomerization reaction first forms a four membered ring transition state and then the product is got.
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用新颖的干粉方法合成系列沸石的研究已从五元环沸石延伸到具有四元环和六元环的方钠石。
The family of zeolites that can be synthesized by the new dry powder method was extended from pentasil zeolites to sodalite having the structure composed of 4- and 6-member rings.
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They want to get as far away from each other possible, the ideal angle is 120. But what we have here is a four-membered ring, so what angle does 90° that have to be, that bond? 90 degrees.
它们想要尽量远离彼此，最理想的是形成120°键角,但现在是个四元环,所以这键角应该多大？
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