天然的物质

Vitamin A,E,C and β-carotene in nature are all important nutriens to people.

维生素A、E、C、天然β-胡萝卜素是人体所需的重要营养物质。

In the studies that analyzed allergy as an outcome, the Galactose oligosaccharide was made from lactose and the Fructose oligosaccharide was made from chicory root , all of which are natural substances.

" "在研究，分析过敏的一个结果是，半乳糖寡糖是由乳糖和果糖低聚糖是由菊苣根，所有这一切都是天然物质。

They are made of very diluted substances that stimulate our body\'s natural resources.

它们是非常稀释物质，刺激我们身体的天然资源。

Lactase is an enzyme that is in the lining of the gut.

还有一些天然物质，像食物中可含有的组织胺，诱发一种类似过敏反应。

The influence of natural surfactants,such as asphaltenes ,resins,solid particles and naphthene,on the stability of the water in crude oil emulsion are summarized.

综述了原油乳状液中天然表面活性物质，如沥青质、胶质、固体颗粒物以及石蜡对原油乳状液稳定性的影响。

Remember, poison ivy is a perfectly natural substance.

请记住，毒常春藤是一个绝对的天然物质。

A black resinous substance obtained from certain trees and used as a natural varnish.

一种黑色的树脂物质，从某些树中提取，用作天然漆。

Product characteristic: The utensil is natural dissolve enzyme formula, delivers effective matter to the skin inner urge a fat to eliminate secreta with natural row, deep of excessive sebum tier.

产品特点：具天然溶酶方子，将有效物质送到肌肤内层，促使油脂粒与过剩皮脂的自然排，深层断根分泌物。

Horny layer is the outmost layer of epidermis, its thickness is decided by different parts of human body, it's about 0.02mm at the thinnest parts, and 0.5mm at the thickest. It is made up of 5-10 layers of enucleated cornified cells that contains keratin and horny fat, which has the capability of resisting weak acids and weak bases , they array closely and become a natural barrier to moisture content and some chemical substances, so as to prevent the water logging of bodily fluids and endosmose of chemical substances.

角质层是表皮的最外层，其厚度依身体部位的不同而定，最薄处约0.02mm，最厚处约0.5mm由5-10层含有角蛋白和角质脂肪的无核角化细胞组成，角质层细胞有抵抗弱酸弱碱的能力，角质层细胞排列紧密，对水分及一些化学物质有天然屏障作用，因而可以阻止体内液体的水渗和化学物质的内渗。

In the current study, anoxic dechlorinations of p, p'-DDT,γ-HCH, HCB in the Liao River sediment were studied under the following conditions: without any additional short chain carbon substrates or vitamin B〓; with the addition of short chain carbon sources (including sodium lactate, sodium propionate or sodium acetate); with the addition of vitamin B〓; with the addition of both short chain carbon substrates and vitamin B〓, with the addition of sodium dodecyl sulfate , a kind of surfactant; the coexistence of the three chlorinated compounds.

氯代有机物一般都是典型的持久性环境污染物，其中部分氯代有机物还是环境激素类物质，例如，滴滴涕、林丹和六氯苯等，这些氯代有机物在环境中的迁移转化一直是国际环境化学领域的热点、重点课题。氯代有机物进入环境水体后，成为沉积物吸附态有机污染物的重要成分，天然水沉积物经常处于缺氧状态。因此，研究氯代有机物在天然水体沉积物中的缺氧脱氯行为是非常必要的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。