以下是引用shuishui_xp在2008-8-2 21:22:00的发言:1.关于 not...but.. 参见OG11-104 not is an awkward way to establish a contrast;instead of,rather than,or unlike are more appropriate idioms to express a contrast. 原来的解释是说"And not"用于引导一个对比不如后面的好 刚才翻了翻XDF的笔记,not but > rather than > instead of ,当然"一切皆有可能",呵呵。 2 关于 by which,Research during the past several decades on the nature of language and the processes by which it is produced and understood ...... 句子的主语是research+时间状语+介短,这个by which it is的it指代的是research而不是 原文本来想指代的nature。 如果这里it是指research那么A中的it又是指代research吗?A也不对了。这个题可恶,我那稍纵即逝的青春被它吃掉了若干小时。最后,我还是倾向A的,原因是读了A和C数十遍,读出了一点understood和understandable的感觉。understandable这里比understood更贴切。 举个例子:Study on Mechanisms by Which GABA Transmitter and Recepter Terminate the Critical Period of Rat Visual Development |