at the back of

在……的后部

at most, at night, at no time, at odds with, at once, at one time, at one's best, 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 beginning of, at the best, at the cost of, at the expense of, at the instance of, at the latest, at the mercy of, 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,