As such, they require a relatively long amount of time to achieve combustion in the engine when it restarts.

因此，他们需要时间来实现在发动机中燃烧相对较长的数额时，重新启动。

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The paper introduces a new method of measuring combustion time with CAT technique for solid rocket engine.

介绍一种应用CAT技术确定固体火箭发动机燃烧时间的新方法。

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But the fuel starting injection pressure will turn low gradually when the operational time of the diesel engine increases. This will cause worsening of the combustion process and fuel economy.

但是随着柴油机使用期的增长，启喷压力会逐渐降低，导致燃烧过程恶化，经济性下降。

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In the 1980s, they like to point out, Mr Gore focused on global warming: he even predicted, amid much derision at the time, the demise of the internal combustion engine.

ECONOMIST: 2001: A Gore Odyssey

Over time, the shipyards became centers of expertise in the internal-combustion engine.

NEWYORKER: Groupthink