我国堤防数量众多，质量参差不齐，对人民生命财产安全造成了很大威胁。

There are a large number of dikes with ragged quality in China.

youdao

我国堤防数量众多，质量参差不齐，对人民生命财产安全造成了很大威胁。

There are a large number of dikes with ragged quality in China.

youdao