弗里德里希·凯库勒发现分子苯的结构想一个环状的客观事实，正是醒于当天的一个白日梦后知道的，在梦里他梦见一群蛇都在追逐着各自的尾巴，于是形成了好多环形。
Friedrich Kekule discovers the unique ring like structure of the molecule benzene right after he wakes up from a day-dream about snakes chasing their own tails and forming rings.
说分子是从与尘埃等被观察到的粒子的类比中构想出来的，明显偏离了这个基本含义。
To say that molecules are conceived by analogy to motes or other observed particles is evidently to depart from that sense of analogy.
在借助大小的类比构想出分子后，我们还用其他类比来描述分子的行为。
Once we have imagined molecules with the help thus of size analogies, we bring other analogies to bear.
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