常见例句双语例句Yet bottlenecks along tracks from coal-producing regions in northern China mean that many coal-burning factories in the South must rely on time-consuming shipments by barge.即使如此，由于华北产煤区的运能瓶颈，南方的很多工厂仍然不得不使用耗时的水运来运输煤炭。 返回 coal barge