多数双效书是殚精竭虑、绞尽脑汁策划出来的。一分耕耘一分收获。但也有极少数双效书似乎却是得来全不费工夫,好像是白捡的,比如,《中国建筑史》就是一个很好的例子。得到双效书的关键就在于,当机会来临时,你有没有足够的准备和勇气迎接它。 Most double-effect book is hard-pressed, brains plan out. No pain no gain. However, there are a very few double-effect books that seem to have been made without any effort, as if they were picked up in white. For example, “History of Chinese Architecture” is a good example. The key to getting a Double Action book is that you have enough preparation and courage to meet it when the opportunity comes.