n.鎮(zhèn)定劑
=tranquilizer(美);tranquilliser(英).
Doctors are still at issue over the proper use of tranquillizers. 醫(yī)生們對如何適當使用鎮(zhèn)靜劑的問題意見仍不一致。
She's on (ie is taking) tranquillizers. 她經(jīng)常使用鎮(zhèn)靜劑。