资料来源 : pyDict

同时,一次;曾经

资料来源 : WordNet®

at one time
     adv 1: simultaneously; "he took three cookies at a time" [syn: {at
            a time}, {at once}]
     2: at a previous time; "once he loved her"; "her erstwhile
        writing" [syn: {once}, {formerly}, {erstwhile}, {erst}]