Rotamerism
(=geometric isomerism)几何异构(现象)
🗣️ 情景例句
How do you stay so young-looking?
你怎样保持如此年轻的?
Deliberate before you begin, then execute with vigour.
著手前要深思熟虑,执行要果断有力。
Most people believe that the strike will last for at least a week.
多数人认为此次罢工至少会持续一个星期。
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