在人类历史长河中，手写语言演化了不仅仅一次。

Written language may have evolved more than once in human history.

youdao

复杂多样的人类历史长河波澜壮阔，集中于这小小卷轴之中，而且不乏细节，这个真不可能。 但是，请细看——人类历史简画。

So here it is, the history of the human race, in pictures.

youdao

在悠久的历史长河中人类逐渐脱离野蛮状态而进入文明。

Man has gradually emerged from barbarism into civilization over the long history.

youdao

在悠久的历史长河中人类逐渐脱离野蛮状态而进入文明。

Man has gradually emerged from barbarism into civilization over the long history.

youdao