General Motors Research Laboratories have spent years of time and millions of dollars trying to find out how and why a spark in the cylinder sets off an explosion that makes your car run; and they don't know the answer.
通用汽车研究实验室花费了数年的时间和数百万美元试图找出气缸中的火花如何以及为什么会引发爆炸，从而使您的汽车行驶；他们不知道答案。