As more and more cars are produced and used, so the emission from their exhaust-pipes contains an ever larger volume of poisonous gas.

随着越来越多的汽车被制造和使用，这些汽车排气管里的排放物所包含的有毒气体的总量也越来越多。

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As more and more cars are running on the streets, so the emission from their exhaust-pipes contains an ever larger volume of poisonous gas.

随着越来越多的小汽车在路上跑，排气管排出的有毒气体也越来越多。

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Generally, higher sedimentation velocity means larger volume of deposits, higher content of organic content, and more hydrocarbon resources.

一般情况下，凹陷沉积速度越大，所堆积的沉积岩体积及有机质含量就越大、油气资源也愈多。

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