Poynting vector
[化] 坡印亭矢量
🧩 词语组成解析
[人名] 波因廷
🗣️ 情景例句
Which band of College English Test have you passed?
大学英语考试过了几级？
Thank you for your advice.
谢谢你的劝告。
As soon as he opened his mouth, everyone burst out laughing.
但他刚一开口说话，人们便哄堂大笑起来。