| 单词 | headwaters | 
| 释义 | headwaternoun  head·wa·ter  ˈhed-ˌwȯ-tər  -ˌwä-   : the source of a stream  —usually used in plural   headwaters nounas in tributarythe beginning part of a stream the first exploration of the Missouri River from its mouth to its headwaters was made by Meriwether Lewis and William Clark in the early 1800s Synonyms & Similar Words Relevance 
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