1.seal off 封闭,把...锁起来
例句:Hundreds of police officers were deployed to seal off the plant and stop strikers from talking to journalists.
数百名警察被调来封锁工厂,并禁止罢工者与记者交谈 。
2.play into the hands of 故意使...占便宜,为...谋方便
例句:This trend has played into the hands of the big private-equity firms, which now lead a fifth of all takeovers, measured by value.
这个趋势对大型私人股权投资公司有利,若以收购价值作为计量标准,它们现在已占全部收购交易中的五分之一 。