“orange alert”造句，怎麼用orange alert造句

An even larger region is under orange alert for smog, after red alerts late last month forced traffic off the roads and closed some schools.

The National Meteorological Center issued an orange alert, saying snow and sleet will sweep across central, eastern and southern regions from Friday night through Saturday.

Beijing has issued and extended an orange alert for heavy air pollution as persistent smog continues to shroud the Chinese capital.