Making a living as a door-to-door salesman demands a thick skin, both to protect agai t the weather and agai t co tantly having the door shut in your face.

• 干挨家挨户上门推销这一营生得脸皮厚，这是因为干这一行不仅要经受风吹日晒，还要承受一次又一次的闭门羹。