wool          
noun [ U ] uk/wʊl/ us/wʊl/
A2 羊毛;动物毛
the soft, thick hair that grows on the bodies of sheep and some other animals
  Australia is one of the world's main producers of wool. 澳大利亚是世界上主要的羊毛产地之一。 
  毛线;毛料
thick thread or material that is made from this
  Put on your red wool cardigan - it'll be nice and warm. 穿上你的红色羊毛衫——会又漂亮又暖和。 
UK How many balls of wool did you need to knit that sweater? 你织那件毛衣需要多少团毛线? 
 - More examples
 - I can't wear wool - it makes me itch.
 - Australia is one of the world's main producers of wool.
 - If you've got any wool to spare when you've finished the pullover, can you make me some gloves?
 - This type of wool is woven into fabric that will make jackets.
 - The ship was carrying a cargo of wool from England to France.
 
Idiom  
pull the wool over someone's eyesidiom  蒙骗(某人)
to deceive someone in order to prevent them from discovering something