问题描述：
the amount of carbon dioxide in the atmosphere has risen by more than 30 percent in
the last 250 years with the half of this increase occuring since 1960 这句是高三课本中的一句 想知道后半句也就是 with the half of this increase occuring since 1960该怎么理解
the last 250 years with the half of this increase occuring since 1960 这句是高三课本中的一句 想知道后半句也就是 with the half of this increase occuring since 1960该怎么理解
问题解答：
我来补答展开全文阅读