at the mercy of
[英][æt ðə ˈmə:si ɔv][美][æt ði ˈmɚsi ʌv]
任…摆布，在…前毫无办法;
例句:
1.
prudent institutions must no longer be at the mercy of reckless behaviour by theircompetitors.
谨慎的金融监管制度不再任由它们的竞争者的鲁莽行为所摆布。
2.
we cannot afford a future in which knowledge is at the mercy of popularity and money.
在知识受流行度和金钱支配的未来，我们无法承受之重。
