anestrus

During the winter, many wild animals enter a period of anestrus to conserve energy.

在冬季，许多野生动物进入不动情期以节省能量。

用法提示：anestrus 作为不可数名词，表示动物在繁殖季节之间的无性活动期。

The vet explained that the dog is in anestrus and will not be receptive to mating for several months.

兽医解释说这只狗正处于不动情期，几个月内都不会接受交配。

用法提示：anestrus 与介词 in 搭配，表示处于该状态。

Unlike humans, most mammals have a distinct anestrus phase between breeding cycles.

与人类不同，大多数哺乳动物在繁殖周期之间有明显的不动情期。

用法提示：anestrus 用作名词，修饰phase，指代一个生理阶段。