Headwaters
n. 源头, 上游
✅ 同义词
🗣️ 情景例句
I'm off today.
我今天休假。
Do you ever go swimming on the weekend?
你曾经在周末去游泳吗？
Don't touch anything unless your teacher tells you to.
除非老师允许，否则你不要动任何东西。