一举[挥,扫],一下子;
The boss sacked half of his employees at one sweep.
老板一下子裁去了半数雇员.
it's impossible to see at one sweep the whole expanse of the heavens by going from one small window to another.
从一个小窗子到另一个小窗子不可能一下子看到整个广阔的天空。
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