1850, "frenzied passion," from Latin oestrus "frenzy, gadfly," from Greek oistros "gadfly; breeze; sting; anything which makes one mad, mad impulse," perhaps from a PIE *eis- (1), forming words denoting passion (see ire). First attested 1890 with specific meaning "rut in animals, sexual heat." Earliest use in English (1690s) was for "a gadfly." Related: Estrous (1900).
雙語例句
1. The next estrus was delayed.
下一次發(fā)情推遲了.
來自《現(xiàn)代漢英綜合大詞典》
2. A cow's estrus cycle averages 21 days.
母牛的發(fā)情周期平均為21天.
來自辭典例句
3. Anestrus ( absence of estrus ) is not a disease but a sign of a variety of conditions.
乏情不是一種疾病,而是一種多方面的體態(tài)跡象.
來自辭典例句
4. In cows and many other animals, the female is in estrus just before ovulation.
母牛和許多其他的雌性動物都正好是在排卵前發(fā)情.
來自辭典例句
5. During estrus, the female is fertile and will accept a male.