Laterogenesis
侧分泌说
🗣️ 情景例句
I hope they aren't lost.
但愿没丢才好。
Bill was very jumpy as he waited for the phone to ring.
贝尔忐忑不安地等着电话来。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。