1、This new pain-killer doesn't take long to act on the pain?
這種新止痛藥不需要很長時間就能發(fā)揮止痛作用。

2、The effect of the pain-killer will wear off in three hours.
這止痛片的效果只有三個小時。

3、I only feel mild pain. I don't think a pain-killer is necessary.
我只感到有稍微的疼痛，我想用不著吃止痛片。

4、Please give me a pain-killer at once.
請立即給我止痛片吧。

5、Now she heard of Pain-killer for the first time.
現(xiàn)在，她第一次聽說止痛藥這種東西。

pain-killer翻譯