When you make a split decision about which line of cars to pull behind at a tollbooth or which line of carts to stand behind at the grocery store , chances are some other line will move more quickly 當你左右為難,很難決定把車開到哪一排道路收費站臺隊伍后面,或將購物車推到哪列收費臺隊伍后面的時候,又有另外的隊肯能前進更快。