oestrus meaning in English
n.
1.机能抗进，激烈的冲动；狂热；【动物；动物学】动情(期)，发情(期) (opp. anoestrum)。
2.牛虻。
Examples
- Preliminary experiment of oestrus synchronization and frozen embryo transfer in sheep
绵羊同期发情及冻胚移植效果观察 - When gilts or sows enter oestrus in their reproductive cycles ( about 21 days long ) they are ready to be bred
小母猪和大母猪的发情期大概是21天，这是她们的生理循环周期。