Ephemeron
n. 蜉蝣
🗣️ 情景例句
Dad saved him, not me.
是爸爸救了他， 不是我。
We waved until the car was out of sight.
我们挥手直到汽车消失。
The first records the arrival of longitudinal vibrations.
首先记录下的是纵向波的到达；