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Making a living as a door-to-door salesman demands a thick skin, both to protect against the weather and against constantly having the door shut in your face. Bill Porter puts up with all this and much, much more.
论坛讨论链接: 待解难句(2009.5.7)
v. 伸展，展开，传播，散布，铺开，涂撒
n.
