This would lead to a selectivepressure on men to take the task of propositioning very seriously indeed.
这就导致选择性的压力,当一个男人必须相当严肃的对待他试图接近的异性。
2
If the individual populations' environments were exerting strong selectivepressure, such differences should have been apparent.
但如果某一人群的环境真正具有很强的选择压力那么上述差异会很明显。
3
Scientists had assumed that great mass would have produced selectivepressure for the larger sacrum, but now they know that the sacral enlargement came first.