external fertilization造句

例句与造句

1. External fertilization occurs when gametes are expelled into a watery substrate from the parental bodies before fusion ; it is typical of sporebearing plants
   当配子在融合之前从亲本体中排出到有水介质时发生体外受精，这是孢子植物的特征。
2. It's difficult to find external fertilization in a sentence. 用external fertilization造句挺难的