painkiller

n.

止痛药；

复数：painkillers

1. Take this painkiller, it usually acts fast.
   把止痛药吃了，这个药见效很快。
2. Tylenol, my painkiller of choice, has this as the main active ingredient.
   是我常用的止痛药，泰诺的主要成分。

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