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
and cheese sandwiches for lunch.
和起士三明治当午餐。
Don't forget to look after him.
不要忘记照料他。
'Now you get out of here, all of you!' he shouted.
“你们都从这里走开，全都走开！”他大叫着，