Putting two and two together, this riddle is not difficult to solve. 【关键词】put two and two together 【误译】把两个2加起来，此谜语不难猜的。 【原意】根据已有的资料推论，此谜语不难猜的。 【说明】put two and two together是口语，意为“根据所知、所闻、所见推断事物，做出结论。”