Ephemeron
n. 蜉蝣
🗣️ 情景例句
OK. Now, I have ... first ... a couple of questions here.
好， 现在，我有……第一……几个问题。
What channel are you watching now?
现在你在看哪个新闻？
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。