在他们的时代,科学知识还不能足以解决这些问题。
In their day scientific knowledge was insufficient to settle the matter.
我们的前辈在他们的时代也面对着同样的畏惧和不安定因素。
That generations who have come before you faced these same fears and uncertainties in their own time.
这种手持石斧以及Kokiselei的其它阿舍利文化的古器物也许早在他们的时代之前便用作工具了。
The hand ax and other Acheulian artifacts at Kokiselei may have been tools before their time.
Because they were used to living in different times.
因为他们习惯住在不同的时代。
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