由此人们便知道观音洞与永定河相通。

From then on it was known that the Cave connects to the River.

youdao

接着，山谷下碧绿的永定河突然出现在眼前。

Then suddenly we saw the green Yongding River in the valley below.

youdao

接着，山谷下碧绿的永定河突然出现在眼前。

Then suddenly we saw the green Yongding River in the valley below.

youdao