核心问题
上面两个介词短语有无区别？
词典解答
after a fashion 在意义上等于 in a fashion, 意思是“勉强”“马马虎虎”“不大好”, 而 after the fashion 后跟 of, 表示“仿照……”“按……方式”“赶时髦”。请对比下列例句：
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John speaks Russian after a fashion, but Jean speaks it much better. (LDCE) 约翰俄语说得不大好,但是琼说得好多了。
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She can play the piano after a fashion. 她能弹钢琴, 不过弹得不大好。
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Her letters were always heavily underlined, after the fashion of Queen Victoria. (Wood) 她的字下面总是划上粗线，这是受维多利亚女王的影响。
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This is a novel after the fashion of Graham Greene. (ALD) 这是模仿格雷厄姆·格林风格的一部小说。