river net

• 水系

river net的用法和样例：

例句

1. The Congo River and its tributaries have formed a complete water system.
   有刚果河及其支流形成的单一完整的水系。
2. This article discusses the river Distribution and function of the Dayan Old Town by using historical Literature, and with site visiting.
   利用历史文献资料，结合实地考察试图讨论古城的水系分布特点，并总结其功能。