birchn.桦树;桦木;用桦条抽打v.用桦条抽打
birchbark桦皮舟
birch oil桦木油
birchbrakn.桦皮舟
birch tar桦木焦油
Birch door桦木门
Birchfieldn.伯奇菲尔德
Birch wood桦树木, 桦树林
birch leaf桦树叶
Birch micen.蹶鼠属
birch fiber桦木锯屑