什么是 basin?An open, shallow, usually round container used especially for holding liquids.The amount that such a vessel can hold.A washbowl; a sink.An artificially enclosed area of a river or harbor designed so that the water level remains unaffected by tidal changes.A small enclosed or partly enclosed body of water.A region drained by a single river system: the Amazon basin. Geology A broad tract of land in which the rock strata are tilted toward a common center.Geology A large, bowl-shaped depression in the surface of the land or ocean floor.