Alkanolamine
链烷醇胺
🗣️ 情景例句
I Wonder whether they will arrive on time.
我也不知道他能不能准时到。
He must needs swim that is held up by the chin.
身不由己，只得从命。
he thinks of it, whatever its size,
当他想像一个物体时，不管其大小如何，