That makes sampling them harder, even if you bother to look in the first place.

这使得样本采集难上加难，即便你能耐着性子待在最初的地点观察。

youdao

That makes sampling them harder, even if you bother to look in the first place.

这使得样本采集难上加难，即便你能耐着性子待在最初的地点观察。

youdao