释义 |
river birchn.(名词)river birchtrunk of a river birch Betula nigra- A deciduous eastern North American tree(Betula nigra) having reddish-brown to silver-gray bark that peels off in papery flakes. Also called black birch 河桦:北美东部的一种落叶乔木(黑皮桦木) ,长有从红褐色到银灰色的树皮,它以轻薄如纸的薄片剥落 也作 black birch
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