夏说英语新闻晨读 第17期:北京雾霾（在线收听）

 本期内容：

Authorities in Beijing issued the Chinese capital’s first “red” smog alert—the highest level. During the alert, between 7am today and noon on Thursday, schools are advised to shut, building sites and some factories will be closed and cars are banned from the streets on alternate date, depending on whether their number plates are odd or even numbers.

词义解析:

alert 警报

alternate 轮流

odd 奇数

even 偶数

depend 依靠