介绍:
Ali：Why is that?
为什么呢？
Paul：Well, partly because of coal burning to provide central heating.
可能是因为中央供暖烧煤的缘故吧。
Ali：Got it. It seems we should be very cautious to resist the smog.
明白了，看起来我们真得小心防雾霾。
Paul：Definitely！Wearing a mask，working out inside，investing in an air purifier and keeping windows closed are all effective ways.
当然！戴口罩、在室内健身、买空气净化器、关闭门窗都是有效的方式。
大家还在听
