The park has about eighty overlooks where you can pull your car off the road and enjoy a view of nature in all its autumn beauty.

VOA: special.2009.09.21

If we have a small engine, and we have to pull the car up a steep hill,a difficult hill, the engine is more likely to collapse,to blow up.

如果我们用的引擎很小，想把车开上一个陡峭崎岖的山坡，引擎很容易损毁，爆炸。

哈佛公开课 - 幸福课课程节选