The main watercourse of Yangtze was made of some surface river sectors and underground rivers.

地表河与地下河相连接构成长江主河道。

youdao

The results have shown that using this method to mine the ore body will not affect the stability of the surface river bed.

结果表明，用该采矿法开采矿体时不会影响地表河床的稳定性。

youdao

Three Gorges is a young river sector, it is not very long to become entirely surface river and realize orient run-through.

三峡库区段是年轻的河段，成为完全地表河和东流的时间不长。

youdao

Cleveland's Cuyahoga River caught on fire because of industrial wastes on the surface of the river.

VOA: special.2011.07.31

River banks often also have clay about one meter or less under the surface.

VOA: special.2009.09.14

Residents said they were concerned that problems were caused by surface water and river flooding.

BBC: Drainage study for flood-hit Tirley to go ahead

The spy Kafkor didn't appear to recognize the figure gaping at him from the surface of the river.

NPR: Excerpt: 'Legends'

He says the hippo sprang from the water, furiously attacked the canoe, then slipped back below the surface of the river.

NPR: Congolese Hunt 'Osama' the Hippo