W-s
[医][=watt-seconds]瓦秒（焦耳-热量单位）
🗣️ 情景例句
and wait until you're ready to go back to work.
而且会等你准备好了才回去工作。
Don't give me any excuses.
不要给我任何理由。
What was the population of the world in 1950?
1950年世界人口是多少？