常見例句Urban roof is one of the components of urban imperviable areas and the roof runoff is an important source of urban nonpoint source pollution. 摘要城市屋麪是城市不透水麪積的一個(gè)重要組成部分，屋麪逕流是城市非點(diǎn)源汙染的一個(gè)重要來源。 返回 imperviable