2.When it comes to the increasing use of motor vehicles in Beijing , some people think that use should be limited . Others argue that the opposite is true . There is probably some truth to both arguments,but emission controls must be instituted regardless of the number of vehicles.
　　涉及北京机动车使用量增加这一问题，有的人认为应该限制使用。另一些人持相反意见。也许双方的观点都有一定道理，但是，无论车辆多少，必须对废气排放实行控制