Ephemerida
n. [昆] 蜉蝣目（等于Ephemeroptera）
🗣️ 情景例句
My mother has a touch of the flu.
我妈得流感了。
I just dropped in to say goodbye.
我只是来告别的。
'Good heavens!' exclaimed his wife.
“天啊！”他的夫人惊叫，