at first sight

乍一看，初看起来

at (the) worst, at a disadvantage, at a good pace, at a guess, at a loss, at a speed of, at a stretch, at a time, at a...price, at all, at all costs, at all events, at all risks, at all times, at any cost, at any rate, at any time, at best, at ease, at first, at full speed, at full tilt, at hand, at heart, at home, at intervals, at large, at last, at least, at leisure, at length, at longest, at lowest, at most, at night, at no time, at odds with, at once, at one time, at one's best,