sperm competition

例句：

1. 1. In the study of human reproduction, sperm competition is a crucial factor in determining the success of fertilization.
   在人类生殖研究中，精子竞争是决定受精成功的关键因素。
2. 2. The sperm competition between male and female is a natural process that leads to the formation of offspring.
   男性和女性之间的精子竞争是一个自然过程，导致后代的形成。
3. 3. In some species, males compete for the right to mate with females by producing more sperm than their rivals.
   在某些物种中，雄性通过产生比对手更多的精子来竞争与雌性交配的权利。