kaka_
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我做了道题, Our modern solar calendar, established in 1582, is based on the J. Calendar, introduced by JC. 这句话没错, 但我的理解是 J. calendar 是JC 创建的, 但有的书上说SVO, doing/done …. S与分词,SVO doing/done …. O与分词,所以introduce在此情况下主语是Our modern solar calendar!这样就不对了嘛!怎么回事?麻烦你了!