puffball  
noun [ C ] uk/ˈpʌf.bɔːl/ us/ˈpʌf.bɑːl/
  (MUSHROOM)     
  马勃菌
a large, white, round fungus that can be eaten
   (SKIRT)     
 (also puffball skirt)蓬蓬裙 
a skirt that has a rounded shape because it is gathered (= pulled together in folds) in at the bottom