天然的物质

Blackening tooth chemical is usually natural material which varies from the North to South of Vietnam.

发黑牙天然化学物质，通常是来自北方的越南南方各不相同。

Ch. Pillot, C?tes de Bourg 298The grape was planting by the natural way. It was planted with out any chemical substance.

以天然的方式种植葡萄，从种植、采收到酿造，均不使用任何化学物质。

A loose, earthy, extremely fine-grained, natural sediment or soft rock composed primarily of clay-size or colloidal particles and characterized by high plasticity and by a considerable content of clay mineral and subordinate amounts of finely divided quartz, decomposed feldspar, carbonates, ferruginous matter, and other impurities; it forms a plastic, moldable mass when finely ground and mixed with water, retains its shape on drying, and becomes firm, rocklike and permanently hard on heating or firing.

中文解释=松散的、土质的、颗粒极细的天然沉淀物或软石，主要由黏土粒径大小或胶质的颗粒组成，特徵为具高可塑性，及大量的粘粒矿物，其次为的细小的石英、被分解的长石、碳酸盐、含铁物质和其他杂质；当精细研磨并和水混合后，可形成可塑的，适於模压的物质，乾燥后能维持形状，加热或烘烤时变得如岩石一般牢固，且长期保持坚硬。

The demulsification mechanism of PAMAM belongs to displacing mechanism. Acylamino groups of PAMAM of integral having strong polarity can take place chemical adsorption with the materials of strong polarity in the exterior of oil drop and be participated in into the membrane, which will result in adsorbed crude surfactant and other active materials to be partially displaced and reduce the intensity of interfacial film between oil and water.

其机理是由于整代的PAMAM具有强极性的酰胺基团，能与油滴表面的强极性的物质发生化学吸咐作用，参与成膜，能把原来吸咐的天然活性剂分子和其它活性物质部分顶替，削弱油水界面膜强度。

The reason that the micro spar the performance surpasses the natural granite, the marble, the synthesis stone and the artificial marble, contains the material ingredient and the formation with him related; The granite is by granulometric compositions and so on quartz, feldspar, mica.

微晶石之所以性能优于天然花岗石、大理石、合成石及人造大理石，与他所含的物质成分及成型有关；花岗石是由石英、长石、云母等颗粒组成。

Express as a result that the study area gets close to hydrocarbon generation center, have high-quality coal measures hydrocarbon source rock along with big hydrocarbon generation intensity, so it has abundant gas source and the material foundation to form large scale natural gas reservoir; Evaporitic tidal flat facies of the Ordovician Majiagou Formation in this area is situated in the austral expanded range of the karstification zone, and is the optimum natural gas prospecting targets of the lower-Paleozoic; In the south of study area, there are well-developed delta deposition system sand bodies of Shanxi Formation and Xiashijezi Formation, hence this area becoming the most beneficial Neopaleozoic natural gas enriched region; In this area, the Paleozoic develop various concealed non-structured traps, the natural gas migration and accumulation process is very beneficial and both the cover and the conservancy condition are also very good.

结果表明：研究区紧邻上古生界生烃中心，发育优质煤系烃源岩，生烃潜力大，气源充足，具备形成大型天然气藏的物质基础；区内奥陶系马家沟组发育有蒸发潮坪相沉积，位于北部古潜台的向南延伸带上，是下古生界天然气的有利勘探目标；南部山西组和下石盒子组发育三角洲沉积体系砂体，是有利的上古生界天然气富集区；研究区古生界发育各种隐蔽性非构造型圈闭，天然气运聚成藏过程非常有利，封盖和保存条件也很好。

Cleanse your baby's skin and pat dry before applying ointment to diapered area.Sweet Almond Oil— Cold pressed from the dried kernels of the almond tree, this medium-weight oil is rich in proteins and vitamin D, and is excellent for the skin and nails.

Burt's Bees 坚持提供最天然的保养品，每项商品包装上都标示着&天然成分百分比&， Burt's Bees 对此的定义是：任何取材自大自然的原料，经过各种先进技术分离，净化（包括过滤、发酵、蒸馏、压榨和其他类似的制程）后所得出的物质。

The study of natural fullerenes is a new area of across fullerene science and geological science. So far natural fullerenes have been found in shungite, fulgurite, carbonaceous conglomerates in impact crater, E/K boundary carbonrich clay rock layer, T/P boundary layer, dinosaur eggshell, coal, heavy crude oil, solid bitumen and socalled seminatural fullerenes in common soots, Chinese ink sticks, commercial char, et al., only with low concentrations.

天然富勒烯研究是富勒烯科学和地质科学相交叉的一个新兴研究领域，迄今为止已在桑加岩、闪电熔岩、陨石撞击坑中的含碳质角砾岩、古近系/白垩系地层界线的含碳粘土岩、三叠系/二叠系界线岩石、恐龙蛋壳、煤、重质油、固体沥青以及半天然的烟灰、木炭、书墨等物质中检测到富勒烯的存在，但含量很低。

Some so-called natural vitamin may be made of dead beef liver, coal tar or petro-chemicals? And some so-called natural minerals are made of mined ore powder, calcium from ground up oyster shells.

一些所谓天然的维他命可能是从死牛肝、煤焦或石油化合物炼制而成的，而一些所谓全天然的矿物质只不过是矿石的粉末，钙则是蚝壳的粉末，人体绝不容易去吸收这些所谓的「天然物质」！

If food already contains natural carcinogens,it does not make sense to add dozens of new man-made ones.

尽管食品中已经含有了天然的致癌物质，但是，再人为地增加一些有毒物质也是很不应该的。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷