Based on previous extinctions, only nine species would have been expected to die off in the same time frame had it not been for mankind's involvement.

根据以往的物种灭绝情况，如果没有人类的参与，在同样的时间内只会有九种物种灭绝。

youdao

Based on previous extinctions, only nine species would have been expected to die off in the same time frame had it not been for mankind's involvement.

根据以往的物种灭绝情况，如果没有人类的参与，在同样的时间内只会有九种物种灭绝。

youdao