检查（车）门、发动机罩和后备箱打开是否平稳，关闭是否牢固。
Check that the doors, hood and trunk all open smoothly and close with solid sound.
汽车的发动机罩已凹了进去。
初学的汽车工程师首先打开他们第一辆车的发动机罩，拔出他们的工具，开始拆卸部件以进行清理和研究。
Budding automotive engineers start by opening the hood of their first car, pulling out their tools, and removing parts to clean and study.
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