求翻译：当然，任何事物都有其两面性。快速发展的气车会导致一系列问题。例如，汽车所发出的噪音就是最重要的一点，汽车的噪音极大程度上影响着人们的生活，汽车噪音使人们无法集中精力，而事实上真正影响人们集中注意力的是噪音强度的变化。同时，汽车排出的废气对人体有很大的伤害，太多的汽车会导致交通阻塞等。是什么意思？

Of course, everything has its two sides. Rapid development of the gas can cause a range of issues. For example, noise from motor vehicles is the most important point, vehicle noise greatly affects people's lives, automotive noise that people can't concentrate, and in fact really affect people focus is the noise intensity changes. At the same time, emissions from cars has a lot of harm to the human body, too many cars will result in traffic congestion.