at the mercy of
[英][?t m?:si ?v][美][?t ?i ?m?si ?v]
任…摆布，在…前毫无办法;
以上结果来自金山词霸
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。
.
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