南四湖是山东省的重要水源地，也是南水北调东线工程的主要调蓄湖泊。

The Nansihu Lake is an important water source in Shandong Province and is one of the main impounded lakes in the South-to-North Water Diversion East Route Project.

youdao

南水北调东线工程是多水源、多用户、多调节水库的大系统，系统的可靠性至关重要。

The east route of South to North Water Transfer Project in China is a multi resources, multi consumer and multi reservoir large system, of which reliability is very important.

youdao

南水北调东线工程是多水源、多用户、多调节水库的大系统，系统的可靠性至关重要。

The east route of South to North Water Transfer Project in China is a multi resources, multi consumer and multi reservoir large system, of which reliability is very important.

youdao