But with regulation of aviation emissions likely in the coming years in order to combat climate change, jet engines must become cleaner and more frugal still.

但是随着未来几年为了抗击气候变化而即将实施航空排放控制，喷气式发动机必须变得更加洁净且更加节省燃料。

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This is a little cleaner, as it keeps the common code common, and it makes development easier as the JET compiler doesn't always give the nicest error messages.

这样可能会更加整洁，因为它保留了代码的通用性，并可以简化开发过程，因为JET编译器并不能总是给出最正确的错误消息。

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Vacuum is generated by application of air jetting effect to allow the moisture absorbing to soft foams and discharged along with the jet in front of the pipeline cleaner.

利用干空气射流作用产生真空，使水分吸附至软体泡沫中，并随着射流排到清管器前端。

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Gasification of coal offers the potential to turn dirty burning hydrocarbons into cleaner burning liquid fuels, such as synthetic natural gas, jet fuel and gasoline, as well as hydrogen for fuel cell use, a developing field.

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