Ephemerida
n. [昆] 蜉蝣目（等于Ephemeroptera）
🗣️ 情景例句
Be careful, I think the neighbors have been spying on us.
小心点，我觉得我们邻居一直在窥视我们。
In college I majored in economics, What was you major?
大学时我主修经济，你主修什么呢？
The geologist needs to know what rocks the drill has reached,
地质学家需要知道钻头已经到达什么样的岩层，