... C皮 Wood(木材） : Northeast Birch(东北桦木实木）或橡木 ...
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northeast birch
东北桦木
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The first step is figuring out how much sap can be extracted from the average birch tree in the Northeast using modern practices, she said.
WSJ: Birch syrup explored as add-on to maple industry
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