内部动机是指人们对学习本身的兴趣多引起的动机。
Intrinsic motivation refers to the motivation caused by the interest in learning itself.
上海通用汽车公司说，它正在召回将近25万辆汽车，以便修理会引起汽车停止行驶或起火的有问题发动机燃油管。
Shanghai General Motors Company says it is recalling almost a quarter-million cars to repair faulty fuel lines that can cause the vehicles to stop working or catch fire.
他查出了引起发动机发出爆震声故障的原因。
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