the popularity of both stules fell dramatically,and the number of rock fans rose sharply.
问题描述：
the popularity of both stules fell dramatically,and the number of rock fans rose sharply.
请问这里为什么用and不用though,不是转折的意思吗?
答
这里应该是表示伴随在发生的事情,两者是同时在发生的.可以换成while