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A colorless, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe, used in the production of synthetic ammonia and methanol, in petroleum refining, in the hydrogenation of organic materials, as a reducing atmosphere, in oxyhydrogen torches, and in rocket fuels.

氢:一种无色,易燃的气体物质,在所有气体中最轻,而宇宙中最多用来生产合成氨和甲醇,提炼石油,氢化有机物质作为收缩的气体,用在氧氢焰熔接器和火箭燃料中。

In this study,di-n-butyl phthalatewas selected as representative endocrine disruptor and the effects of different materials contained in natural water on the DBP ozonization under diffe- rent conditions were studied.

以邻苯二甲酸二正丁酯为典型内分泌干扰物质的代表物,对饮用水中大量存在的不同物质在不同反应条件下对O3氧化DBP的影响进行了研究。

The main results as follows:1. Dry weight of heading stage showed a parabolic curve relationship with yield. And grain yield correlated well with dry matter accumulation after heading and total dry weight of muturing stage. The accumulation of dry matter from N-n to heading stage correlated with photosynthetic potential.

水稻抽穗期干重与产量呈抛物线关系,抽穗后干物质积累量和成熟期总干重与产量均呈极显著线性正相关。N-n期至抽穗期干物质积累量随着光合势的增加而增加,两者相关达到显著水平,而与净同化率关系不密切。

This article in discusses the city ecology community sports concept under the frame, proposed the city ecology community sports construction should consider the material sports environment, the non- material sports environment and the inhabitant sports behavior and so on three aspects mutual functions and affect such viewpoint, in view of our country city community sports construction characteristic, proposed the city ecology community sports construction difference and the traditional community sports three property, namely "society property,, the region and the paragenesis", elaborated the city ecology community sports construction characteristic and the content, and proposed the city ecology community sports construction pattern and the different type city ecology community sports construction concrete measure.

本文在探讨城市生态社区体育概念的框架下,提出了城市生态社区体育建设应该考虑物质体育环境、非物质体育环境和居民体育活动行为等三个方面的相互作用和影响这样的观点,针对我国城市社区体育建设的特点,提出了城市生态社区体育建设区别与传统社区体育的三性,即"社群性、地域性和共生性",阐述了城市生态社区体育的建设特点与内容,并提出了城市生态社区体育建设的模式与不同类型城市生态社区体育建设的具体措施。

But for industrial production of polypeptides, it is particularly important of its separation and purification techniques or mass production. It is significant to study these parathion and analyses of polypeptides so as to contribute to industrialization.

而对于多肽物质的工业化生产来说,多肽物质的分离纯化、大量制备就显得格外重要,它的分离与分析技术是生物技术实现产业化的关键。

In this chapter, the author expounds the characteristics of black family and black people's peculiar concept of family in slave system.

第三章从奴隶的衣、食、住所和医疗条件等方面描述黑人的物质生活,从中探察黑人如何在奴隶制下发展自身的物质文化。

Size, Substance, Proportion Size/Substance - The Pekingese, when lifted, is surprisingly heavy for its size.

大小,物质,比例按规定尺寸制作/物质- Pekingese,何时升高,令人惊讶地对它的大小是重的。

The research results imply that the regional tectonic stress field has resulted in deformation and flow of upper mantle material with clockwise rotation,and make the alignment of upper mantle peridotite lattice parallel to the direction of material deformation. The deformation of the crust and upper mantle is possibly vertically coherent deformation.

研究表明青藏高原东北缘上地幔物质在区域构造应力场的作用下,发生了顺时针旋转的形变以至流动,使得上地幔中橄榄岩的晶格排列方向平行于物质形变或流动方向,上地幔变形和上覆地壳变形可能存在垂直连贯变形特征。

The results showed that the chemical properties of two kinds of Perillas were quite different; Pigment stability of Japanese red Perilla to heat and light was better than that of local Perilla.

结果表明:不同种类紫苏的水溶性色素物质的化学性质有较大差异,红紫苏色素对热、光等的稳定性及多酚类物质含量、色素含量、抗氧化活性均高于紫青紫苏。

Physical chemistry a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary.

一个系统中物质的独特状态;具有相同的化学成分和物理状态并由相位临界点分开的物质

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。