| 单词 | painless |
| 例句 | painless adjective 1.•any killing of animals should be painless:without pain, pain-free. ANT painful. 2.•getting rid of him proved to be painless:easy, trouble-free, effortless, simple, plain sailing | informal as easy as pie, a piece of cake, child's play, a cinch. ANT difficult. |
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