a channel for the water current that turns a millwheel
同义词：millrun
millrace详细解释
mill.race n.（名词）The fast-moving stream of water that drives a mill wheel.水流：推动磨坊水轮的流速很快的水流The channel for the water that drives a mill wheel.Also called millrun 水沟：推动磨坊水轮的急流的水沟也作 millrun
