查询词典 birch bark

MATERIAL AND METHODS: Betulin was isolated from dry powder of the bark of silver birch by using ethanol circumfluence, decompress concentration and methanol-chloroform recrystallization.

材料与方法：取一定量的白桦树皮干粉，通过乙醇回流，减压浓缩和甲醇-氯仿重结晶等步骤获得白桦酯醇纯品。

BACKGROUND ＆ AIM: Betulin is an important triterpene. We investigated the antitumor activity of betulin, extracted from the bark of silver birch.

背景与目的：白桦酯醇是一种重要的三萜类生物活性分子，本文从白桦树皮中提取获得白桦酯醇纯品，然后研究该生物活性分子抑制食管癌细胞的活性。

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

一、桦树皮大院桦木酸，正测试作为治疗黑素瘤和其他严重疾病。

I would put them there and strike a match to light a piece of paper, or a piece of birch bark, or a piece of felt paper, or a piece of fatwood.

我把它们放在那儿，划一根火柴，点燃一张纸，或桦树皮，或油毡纸，或明子。

I pass my hands lovingly about t he s moot h s kin of a s ilver birch,or t he rough s haggy bark of a pine.

春天里我满怀着希望触摸着树枝寻找新芽，那是大自然冬眼后醒来的第一个征象。

Also, among tzi's possessions were berries, two birch bark baskets, and two species of polypore mushrooms with leather strings through them.

另外，都在奥茨的财产浆果，两个桦树皮篓，两个与皮革串通过这些多孔菌蘑菇种。

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

我把最后一块桦树皮放进火里，把火煽得旺了起来。

The arrow was not painted, as Simon had assumed: rather it was carved from some wood as white as birch bark, and fletched with snow-white feathers.

和Simon之前的推测不民，这支箭并非全无一点装饰：它是用类似白桦树的木质雕刻的，箭羽是雪白的羽毛。

The arrow was not painted, as Simon had assumed: rather it was carved from some wood as white as birch bark, and fletched with snow-white feathers.

和Simon之前的推测不同，这支箭并非全无一点装饰：它是用类似白桦树的木质雕刻的，箭羽是雪白的羽毛。

Without their skilled hunting techniques, knowledge of the territory and advanced tools such as snowshoes, toboggans and birch-bark canoes, the fur trade would not have existed.

如果没有他们出色的狩猎技能，对这片土地的了解，以及像雪鞋，雪橇，桦皮制的独木舟等先进的工具，毛皮贸易肯本不可能存在。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。