Founded in 1983,the magazine has since more than doubled its circulation and its advertising.
问题描述：
Founded in 1983,the magazine has since more than doubled its circulation and its advertising.
这句话中的since是什么意思?还有就是觉得这句话很奇怪,
答
since这里 是副词 之后 的意思
原句=the magazine has more than doubled its circulation and its advertising since.