Complexant
配位剂
🗣️ 情景例句
Should be.
应该是开的。
There is much to be said on both sides.
公说公有理，婆说婆有理。
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！