自从我开始搜集陈梦家的生平材料时开始，我已经知道一切已经太晚了。
From the beginning of my research, I had known that it was too late to discover what had really happened to Chen Mengjia.
自从我开始搜集陈梦家的生平材料时开始，我已经知道一切已经太晚了。
From the beginning of my research, I had known that it was too late to discover what had really happened to Chen Mengjia.
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