Poynting vector
[化] 坡印亭矢量
🧩 词语组成解析
[人名] 波因廷
🗣️ 情景例句
And I'd also like to thank my math teacher
我还要感谢我的数学老师
He that hath a full purse never wanted a friend.
金钱满袋，朋友盈门；钱袋装得饱，朋友不会少。
A mooncake is a delicious, round cake.
月饼是一种味美的圆糕点。