常見例句雙語例句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，由于華北產(chǎn)煤區(qū)的運能瓶頸，南方的很多工廠仍然不得不使用耗時的水運來運輸煤炭。 返回 coal barge