主要成分

Premise Liquefied petroleum gas is derived from oil gas, natural gas, the gas production of refinery and petrochemicals. The main components are dimethylmethane, propylene, butane, butylene and such low class hydrocarbon. It's a gas with achromaticity and transparence; LPG is hardly dissolved in water, but dissolved in ethanol and aether, it can dissolve gas production, propagation oil and caoutchouc.

液化石油气（liquefied petroleum gas，LPG）是石油伴生气、天然气、炼油厂及石油化工厂的气体产品，经分离精制而来，其主要成分为丙烷、丙烯、丁烷、丁烯等低分子烃；无色透明，带有微弱的臭味；难溶于水，溶于乙醇和乙醚等，并能溶解石油产品，动植物油和天然橡胶。

It is a major component in acid rain.

二。 它是酸雨的主要成分。

The EDTA acid can be recycled after acidulation.

有报道，新工艺的化学镀铜液[3]，主要成分也是由铜盐和络合剂EDTA等组成。

Desmosomes are composed largely of proteins from three major gene families: desmosomal cadherins, armadillo family proteins and the plakin family of cytolinkers.

桥粒是细胞间连接、粘连的主要分子，主要成分包括桥粒钙黏着蛋白家族、犰狳蛋白家族和血小板溶蛋白家族等。

Researching the plants that were associated with savanna, Packard soon came up with a list of other associated species -- such as thistles, cream gentians, and yellow pimpernels -- that he quickly realized peppered the fringes of his restoration sites.

主要见于东非、南美巴西高原和印度等地。以高达1米以上的旱生禾草为主要成分所组成的草被层占优势，在这种草被层的背景上散生着一些旱生矮乔木。

Icariin, the main constituent of Epimedium sagittatum Maxim, and its metabolite icariside Ⅱ showed similar activity in cell proliferation. The total flavonoids from Viscum coloratum Nakai could stimulate cell proliferation and significantly promote cellular ALP activity. Daidzein and its derivatives exhibited no significant activity in cell proliferation.

结果发现：中药淫羊藿中的主要成分淫羊藿苷及其大鼠体内主要代谢物淫羊藿次苷Ⅱ具有类似的作用，可显著促进成骨样细胞的增殖；中药槲寄生总黄酮对成骨样细胞的增殖有一定的促进作用，并可显著提高细胞内ALP活性；大豆苷元及其衍生物对UMR106细胞的增殖作用不明显。

Based on the principle of molecular emission in hydrogen flame,sulphur-containing and phosphorus-containing substances in solutions were determined directly using self-made apparatus.

1前言硫化合物如甲硫醚等是造成环境水体中恶臭污染的主要原因之一[1]，同样磷是有机磷农药、磷肥的主要成分，也是环境水质监测中的重要元素。

Factory of its main ingredient is one of ethylene vinyl acetate copolymer as the main material, add tackifier and other ingredients together with solid-type adhesive.

本厂其主要成分是以乙烯一醋酸乙烯共聚物为主要材料，加入增粘剂与其它成份配合而成的固体型粘合剂。

Factory production of hot melt adhesive has passed SGS environmental protection certification, its main ingredient is one of ethylene vinyl acetate copolymer as the main material, adding tackifier and other ingredients together with solid-type adhesive.

本厂生产的热熔胶已通过SGS绿色环保认证，其主要成分是以乙烯一醋酸乙烯共聚物为主要材料，加入增粘剂与其它成份配合而成的固体型粘合剂。

A specific target of the free radicals are the polyunsaturated fats that are a major part of cell membranes.

自由基所攻击的一个主要目标，是组成细胞膜的主要成分多元非饱和脂肪酸。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。