at the mercy of

在...支配下

at other times, at peace, at present, at random, at regular intervals, at sb's disposal, at sb.'s heels, at sea, at sight of, at stake, at table, at that, at that rate, at the back of, at the beginning of, at the best, at the cost of, at the expense of, at the instance of, at the latest, at the moment, at the rate of, at the same time, at the thought of, at the worst, at this rate, at times, at work, at worst, AT&T, at-home, atavism, atavistic, ate, atelier, atheism, atheist, atheistic, Athelney, Athens,