短语 | know sth like the palm of one’s hand |
释义 | know sth like the palm of one’s hand对某事了如指掌:He is an old sailor and has followed the sea all his life,so he knows navigation affairs like the palm of his hand.他是个老海员,一辈子从事航海工作,所以对航海事务了如指掌。 |
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