Ephemerida
n. [昆] 蜉蝣目（等于Ephemeroptera）
🗣️ 情景例句
He did it as a special favor.
他做这事算是特别照顾。
Count not your chickens before they are hatched.
不要过早乐观。
Can I give it to you now?
现在就下给你，可以吗？