这是一个小村庄，位于河口附近。

It is a small village, by the ___mouth ___of ___a ___river.

河口狭窄的出口入海处常产生强水流。

The ___mouth ___of ___a ___river with a narrow exit to the sea often creates strong currents.

河流河口处的沉积物随时间形成三角洲。

Sediment deposition at the ___mouth ___of ___a ___river forms a delta over time.