牛津译林 模块六第二单元 M6U2 Grammar and usage语法
When compared with the size of the whole earth, the biggest ocean does not seem big at all. (分词部分相当于When the biggest ocean is compared with the size of the whole earth, 主语与分词是被动关系。) When comparing it with the size of the whole earth, we find that the biggest ocean does not seem big at all. (When we compare it with the size of the whole earth…主语与分词是主动关系。)