时间在不知不觉之中飞快地过去了——没有人知道过了多久。
Time--nobody knew how much of it--swept by unheeded and unnoted.
城市已在不知不觉之中改变，但摄影师用镜头拍摄下来的照片至今仍在激励着我们。
The city has changed insidiously, but the image that the photographers have fixed on their photos still inspire us this day.
他狂乱地敲着自己的前额——什么时候，呵，什么时候在他的不知不觉之中得到成功了呢？
He struck his forehead wildly — where, o where had he without knowing it achieved success?
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