Poynting vector
[化] 坡印亭矢量
🧩 词语组成解析
[人名] 波因廷
🗣️ 情景例句
almost every night this week, Dad.
几乎这个星期的每天晚上都如此， 爸爸。
He that has a tongue in his head may find his way anywhere.
遇事多问，随处可行。
Mum, I don't feel very well.
妈，我感觉不舒服。