Polyethyleneimine
聚乙烯亚胺
🗣️ 情景例句
It's easy to pick something for my colleagues, but it's difficult for my boss.
给同事们的应该不难买，但是给老板的就难罗。
Never fry a fish till it's caught.
捉到鱼，才煎鱼。
and, behind the spectators, of the nations who work themselves into furies over these absurd contests, and seriously believe --
以及观众身后各个国家的态度。面对着这些荒唐的比赛，参赛的各个国家会如痴如狂，甚至煞有介事地相信 --