倍比定律规定了不同原子间化合比的基本特征。

The law of multiple proportions has insisted on the fundamental character of the combining ratio for different atoms.

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当时他们用这种激光来激发并电离那些被火焰的高温裂解出来的原子，目的是测量不同火焰的特征辐射。

They were using the laser to excite and ionize the atoms liberated by the heat of the flame in order to measure the characteristic emissions of different flames.

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各溜分可以由碳氢化合物的碳原子数确定其特征。

The various distillates can be roughly characterized by the number of carbon atoms in their constituent hydrocarbons.

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So, for example, when people, and we'll talk about this next class, were looking at different characteristics spectra of different atoms, what they were seeing is that it appeared to be these very discreet lines that were allowed or not allowed for the different atoms to emit, but they had no way to explain this using classical physics.

举个例子，当大家看到,不同原子的特征光谱时,他们看到的是一些分离的线,那可以使不同的原子,发射或不发射出去，但是这些无法用经典物理来解释。

麻省理工公开课 - 化学原理课程节选