Protocuridine
原箭毒定
🗣️ 情景例句
World-class athletes are extremely fit.
具有国际水平的运动员体格非常好。
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
where chance discoveries play a much larger part than they do in physical and mechancal industries.
同物理和机械工业相比，化学工业中偶然发现的机会要多得多。