We found that birch bark could serve as paper .

我們發(fā)現(xiàn)樺樹皮可以作紙用。

I pass my hands lovingly about the smooth skin of a silver birch or the rough shaggy bark of a pine.

我用手喜愛地撫摩過一株白樺那光潮的樹皮免费欧美网黄色网站，或一棵松樹的粗糙樹皮黄色电影你懂的。

I pass my handslovingly about the smooth skin of a silver birch, or the roughshaggy bark of a pine.

春天在线免费观看黄片日，我觸摸樹枝，滿懷希望地尋找新芽www.黄色片com，那是大自然經(jīng)過一個冬天的沉睡后蘇醒的第一個標志亚洲黄网免费。

And a birch bark compound, betulinic acid, is being tested as a treatment for melanoma and other serious diseases.

一、樺樹皮大院樺木酸亚裔美女被黑人巨大进入，正測試作為治療黑素瘤和其他嚴重疾病男人插入女人黄色网站。

I put the last of my birch bark on the fire and fanned it into life.

我把最后一塊樺樹皮放進火里，把火煽得旺了起來黄色网站在线观看不卡。

birch bark：樺皮

biological testing of wood preservatives 木材防腐劑生物試驗 | birch bark 樺皮 | birch bark tar 樺皮焦油

birch bark：樺樹皮

樺類 Birch | 樺樹皮 Birch-bark | 樺皮焦油 Birch-bark tar

birch bark tar：樺皮焦油

在芬蘭的一次考古挖掘中,她發(fā)現(xiàn)了一小塊樺皮焦油(Birch bark tar)--上面還留有牙印. Pickin小姐的導師Derby大學的Trevor Brown教授指出,樺皮焦油含有石灰酸(phenols),石灰酸是一種具有殺菌功能的化合物.

birch bark tar：樺皮木焦油

birch bark 樺皮 | birch bark tar 樺皮木焦油 | birch conk 樺木多孔菌

Betula Alba (Birch) Bark Extract：白樺樹皮提取物

Gentiana Lutea (Gentian) Root Extract 黃龍膽根提取物 | Betula Alba (Birch) Bark Extract 白樺樹皮提取物 | Cucumis Sativus (Cucumber) Fruit Extract 黃瓜提取物