2.Himalayan goat having a silky undercoat highly prized as cashmere wool.
3.HAIR : Medium length, straight with dense undercoat, never soft, wavy or wiry.
毛质：中等长度，直，底毛密，不可以软、成波状或丝状。
4.The undercoat on black and tan dogs also may be grey or tan.
黑色同栗色混杂品种的内被毛也可能是灰的或栗色的。
5.He has a soft, dense undercoat with a profuse harsh-textured outer coat.
他拥有柔软、浓密的底毛和粗硬的披毛。
6.An undercoat of paint or size applied to prepare a surface, as for painting.
底漆，涂底料油漆之前，涂在某一表面上作准备的底漆或涂料
7.This means that they have a soft, downy undercoat and a harder guard coat.
也就是说他们除了一层柔软的底层毛以外，还有一层比较厚硬的外层毛。
8.Do not reward a dog with a soft silky coat and no undercoat.
绝不能判定一只毛质柔软如丝或者没有足够底毛的犬胜出。
9.The soft, fine undercoat of certain mammals, such as otters, beavers, and seals.
10.To prepare(a surface) for painting by covering with size, primer, or an undercoat.
在…上涂底漆在（某一表面）涂上底漆、底色或胶料以便油漆
