cleistogamy

例句：

1. 1.In cleistogamy, the two parents do not mate, and their offspring are genetically identical.
   在无性交繁殖中，两个父母不进行交配，他们的后代是遗传上相同的。
2. 2.Cleistogamy is a rare phenomenon in which two individuals do not mate.
   无性交繁殖是一种罕见的现象，其中两个个体不进行交配。
3. 3.Cleistogamy has been observed in several species of plants and animals, including humans.
   无性交繁殖已在多种植物和动物物种中观察到，包括人类。