The boat's engine misfired after he tried to start it up.
他试着启动船的引擎，但没发动起来。
How long should the engine warm up before we start?
这引擎在起动前应预热多长时间？
The driver revved up the engine, getting ready to start.
司机发动引擎，准备开车。
Start the engine and allow to warm up.
启动引擎，准许变热。
Start the engine and allow to warm up.
启动引擎，准许变热。
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