... biological testing of wood preservatives 木材防腐剂生物试验 birch bark 桦皮 birch bark tar 桦皮焦油 ...
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桦皮焦油 birch bark tar
糙皮桦 Betula utilis ; Indian birch
桦皮酸 betulinic acid
桦皮醇 betulin
光皮桦 Betula luminifera ; Betule luminifera Winkl ; luminifera ; Betula luminifera H. Winkl
纸皮桦 Betula papyrifera ; paper birch ; canoe birch ; paperbirchBetulapapyriferaMardh
棘皮桦 Betula dahurica ; MONARCH BIRCH ; Betula duburica
白桦树皮提取物 birch bark extract ; Betula Platyphylla Japonica Bark Extract ; Betula Alba Bark Extract
铁皮桦 Betula brunnea
月光沐浴缅因州阿拉加什河的桦皮独木舟，这里是划桨者的宁静场所。
Moonlight bathes a birchbark canoe on Maine's Allagash River, a tranquil spot for paddlers.
月光沐浴缅因州阿拉加什河的桦皮独木舟，这里是划桨者的宁静场所。
Moonlight bathes a birchbark canoe on Maine's Allagash River a tranquil spot for paddlers.
结果还表明在每年的这个时间，在夏天的时候，纸皮桦给花旗松送的碳比花旗松反送给它的要多，特别是当花旗松见不到阳光的时候。
It turns out at that time of the year, in the summer, that birch was sending more carbon to fir than fir was sending back to birch, especially when the fir was shaded.
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