silver birch
noun
1- a Eurasian birch with silver-grey bark, common on poorer soils to the northern limit of tree growth欧洲（白）桦。
1.1
- Betula pendula, family Betulaceae.拉丁名Betula pendula, 桦木科。
1.2
- N. Amer. another term for PAPER BIRCH.〈北美〉同PAPER BIRCH.