1、In polygynous species, males often compete for access to multiple females.
在一夫多妻的物种中，雄性常常为了能够与多个雌性交配而展开竞争。

2、The study found that polygynous mating systems can lead to high levels of sexual dimorphism.
研究发现，一夫多妻的交配制度可能导致较高程度的性二型化。