他们教我们拆卸、安装汽车引擎。
They taught us how to strip down a car engine and put it back together again.
他听到敞开的门口外的汽车引擎运转良好。
He heard the car engine running sweetly beyond the open door.
我想我们可以先问问观众哪种汽车引擎被最早设计为使用化石或生物燃料。
I thought we could start by asking our audience what car engines were first designed to run on-fossil fuels or biofuels.
If we build an engine for a car or anything else, it almost always is going to have some key element that's operating in a cycle, otherwise it won't keep going, right.
如果我们为一辆汽车,或其他什么东西制造一台引擎,它总要有一些关键,要素来形成循环。
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