motor car exhaust

例句：

1. 1. The motor car exhaust is a majorsource of air pollution in the city.
   汽车尾气是城市空气污染的主要来源。
2. 2. Theexhaust fumes from the factory have beenaffecting the nearby residents' health.
   工厂的废气已经影响到了附近的居民健康。
3. 3. Theexhaust fumes were so strong that theycould be seen from a distance.
   废气非常浓重，可以远观。