否则有机物质就会遭热力作用而转化成毫无价值的非碳氢化合物——黑色含炭物质。

Or the organic material will be transformed by heat into a non-hydrocarbon black carbonaceous material of no value.

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在汽油机的一个测试循环中，约占排放污染物总量70%～80%的非甲烷碳氢化合物是在汽油机冷起动阶段没有经催化转化而直接排入大气中，造成严重污染。

In a testing of petrolic engine, about 70% to 80% of nonmethane hydrocarbon is emitted into atmosphere without catalysis conversion in theoment of coldstart, so that serious pollution is produced.

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本文对气体与碳氢化合物液体燃料颗粒以及悬浮铝粉尘中的非定常两相爆轰进行了理论和数值研究。

Unsteady detonation in gas-fuel droplet systems and suspended aluminum dust was theoretically, numerically studied in this thesis.

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