brood stage

例句：

1. 1. The broodstage is crucial for the survival of thespecies.
   繁殖期对物种的生存至关重要。
2. 2. Duringthe brood stage, the femalebird lays eggs and cares forthem.
   在产卵期，雌性鸟会下蛋并照顾它们。
3. 3. The brood stage is a time when theyoung are vulnerable to predators.
   产卵期是幼崽易受捕食者攻击的时期。