... birch water 桦木汁 common birch 欧洲桦 birch black 桦木黑 ...
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common silver birch 桦树花粉
common birch
常见的桦树
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Birch pollen, one of the most common causes of hay fever in Britain.
在英国，桦树花粉是花粉症的最常见诱因之一。
youdao
It's most common in hard maple, but also occurs in birch, ash and, in rare cases, black walnut.
NPR: Excerpt: 'A Splintered History Of Wood'
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