元素的原子数，是元素的一个分子中原子的数目。
The atomicity of an element is the number of atoms in one molecule of the element.
根据分子结构的特点，用距离矩阵表征分子中原子的连接性。
Based on the characteristics of molecular structure, the distance matrix was used to characterize the connectivity of the atoms in the molecule.
化学家们早就知道，在分子中原子以特定的取决于整体分子结构的频率振动。
Chemists have long known that atoms in a molecule vibrate at a particular frequency, depending on their overall molecular structure.
核磁共振(nmr)谱的研究可以获得分子几何结构，分子中原子的成键情况以及相互作用等重要结构信息。
The structural information of molecular geometric structures and bonds between atoms can be obtained by study on nuclear magnetic resonance (NMR).
有机化学中的伍德沃—霍夫曼定律(由霍夫曼和罗伯特·伯恩斯·伍德沃发现)可以预测某些分子中原子排列位置。
Organic chemistry's woodward-hoffmann rules (which Hoffmann developed with Robert Burns Woodward) predict the positions of atoms within certain kinds of molecules.
白天，50千米以上的大气层中原子和分子吸收太阳光的能量，夜晚又将这些能量释放出来，主要产生出我们从轨道上看到的绿色光。
Atoms and molecules above 50 kilometers in the atmosphere are excited by sunlight during the day, and then release this energy at night, producing primarily green light that is observable from orbit.
氧在表面存在三种吸附态，其中原子态吸附氧是乙烯环氧化和深度氧化的活性物种，分子态氧对两个反应不起直接作用。
The adsorbed atomic oxygen is the common oxygen species for both ethylene epoxidation and combustion; molecular oxygen plays no direct role in either two reactions.
氧在表面存在三种吸附态，其中原子态吸附氧是乙烯环氧化和深度氧化的活性物种，分子态氧对两个反应不起直接作用。
The adsorbed atomic oxygen is the common oxygen species for both ethylene epoxidation and combustion; molecular oxygen plays no direct role in either two reactions.
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