But there is also time for brief diversions onto bizarre ground, such as a discussion of the skyscraper index (which holds that a boom in skyscraper construction is a foolproof sign of an imminent recessio.
出自-2013年6月閱讀原文
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
ADJ-GRADED
(計(jì)劃、機(jī)器等)十分簡單的，容易操作的，萬無一失的
Something such as a plan or a machine that is foolproof is so well designed, easy to understand, or easy to use that it cannot go wrong or be used wrongly.