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| 汽车尾气 (一种在空气中悬浮的微粒气体流体，由轮式机器或内燃机驱动的交通工具产生和排出的副产品。) | |||
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vehicle exhaust gas : 3 phrases in 2 subjects |
| Automobiles | 1 |
| Environment | 2 |
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