| 例句 |
noun attempts to reduce smog caused by traffic fumes旨在降低车辆尾气造成的烟雾的措施 Smog levels are high today. a layer of smog over the city measures to reduce smog Nowadays, smogs are very common in major cities. The city has had only limited success in reducing smog levels. The streets are clean, there’s no traffic, and there’s no smog to block out the sunshine. |