名词源头，发源地
1. 源头：headstone 墓碑 | headstream 源头 | headstrong 顽固的
2. 源流：headstone /墓石/ | headstream /源流/ | headstrong /顽固的/
1. He also stressed the importance of tightening supervision over the headstream of the food circulation chain.
911chaxun查询·英语单词大全
noun
1. a stream that forms the source of a river