Rayleigh number
[化] 瑞利数
🧩 词语组成解析
n. 瑞利（姓氏）；雷利（极光和夜天光的发光强度的单位）
🗣️ 情景例句
Harvey, how are you?
你好吗，Harvey？
The plane has crashed.
飞机失事了。
But this does not worry me.
但我从不为此烦恼。