7. What are the advantages and disadvantages of cars?
On the one hand, cars are very convenient. People can drive their cars to go anywhere at anytime,which is impossible if they take buses because buses have their fixed traveling routes and fixed time of departure and arrival. Besides ,in terms of speed and comfort,cars are incomparable for short trips. Finally,in case of emergency,you can get in your car immediately and drive to your destination without waiting for buses or taxies,which can save your time and sometimes even your life. On the other hand, cars also have their own disadvantages, of which pollution should deserve our consideration. As it is known, the exhaust gases emitted by cars can seriously contaminate the air and even cause people to die if inhale too much. Moreover ,with the number of cars increasing rapidly, the problem of traffic jams is becoming more and more serious. They slow down the speed at which people arrive at their destination. Finally, cars also bring us troubles. For example,we frequently see people anxiously driving their cars looking in vain for a parking space.
—方面，汽车很方便。人们可以随时开车去任何地方，如果坐公交车就不可能了，因为 公交车有固定的运行路线以及固定的出发和到达时间。此外，在速度和舒适方面，汽车在短途 旅行中是无可匹敌的。而最后，如果发生紧急情况，你可以立即上车然后开往目的地不用等待公交车或出租车，这能节省你的时间有时甚至是生命。另一方面，汽车也同样有自己的劣势， 汽车导致的污染应在我们的考虑之中。众所周知，汽车排放的废气可以严重地污染空气如果吸入过多废气甚至致人死亡。并且，随着汽车数量的快速增加，交通堵塞的问题变得越来越严重，降低了人们到达目的地的速度。最后，汽车也带给我们麻烦。例如，我们屡次看到人们开着车焦急徒劳地寻找停车位。