零钱不用找了在教堂的义卖市上卖旧书时，我与一名准备买东西的顾客发生了一场争论。
Keep the Change Selling secondhand books at our church bazaar, I got into an argument with a prospective customer.
科学家询问了200个行人，让他们评估楼梯的坡度，然后又找了另外200人去评估自动扶梯的坡度——人们总不用攀登自动扶梯了吧。
The scientists asked 200 passersby to estimate the Angle of a set of stairs, and another 200 to do the same for an escalator-which, of course, requires no effort to ascend.
科学家询问了200个行人，让他们评估楼梯的坡度，然后又找了另外200人去评估自动扶梯的坡度——人们总不用攀登自动扶梯了吧。
The scientists asked 200 passersby to estimate the angle of a set of stairs, and another 200 to do the same for an escalator—which, of course, requires no effort to ascend .
科学家询问了200个行人，让他们评估楼梯的坡度，然后又找了另外200人去评估自动扶梯的坡度——人们总不用攀登自动扶梯了吧。
The scientists asked 200 passersby to estimate the angle of a set of stairs, and another 200 to do the same for an escalator—which, of course, requires no effort to ascend .
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