attested 1530s, then not again until 1792 (in descriptions of Kentucky), so possibly the modern word is a re-formation; see head (n.) "origin of a river" + water (n.1).
权威例句
1. They were born in headwaters of some stream.
他们是出生在某一小河上游源头.
2. Then the change of annual runoff distribution in the headwaters of the Yangtze River is discussed.
3. A river watering the garden flowed from Eden; from there it was separated into four headwaters.
10有河从伊甸流出来,滋润那园子, 从那里分为四道.
4. China has three operational dams on the river's headwaters Yunnan and two more are being built.
中国在云南上游流域有三座正在运行的水坝,目前在建的还有两座.
5. Water - injection system contain headwaters, water - injection station, water distributing station, injection headinjection well site and injection line.