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The composition of Jupiter is 75% hydrogen and 25% helium by mass, with traces of ammonia, water and methane.

木星的组成是75％，氢和氦25％的质量与氨，水和甲烷的痕迹。

In this paper,the composition technics and technical requirement of cladding additives of ammonium nitrate are studied.

文章主要对包覆硝酸铵所选用材料的复合工艺及技术要求等进行研究。

Silicon tiny powder is tiny amorphism grain that is carried out by smoke when we smelt ferrosilicon and metal silicon. Its major composition is SiO2, and it has superior pozzuolana performance.

硅微粉是冶炼硅铁和金属硅时被烟气带出炉外的无晶形细颗粒，其主要成分是SiO2，具有优越的火山灰性能。

By amphibole composition, the metamorphic temperature is 500～600℃ while the pressure is about 5kb.

根据变质矿物组合估计形成温度为300～350℃，压力为4kb左右。

Using SDS-PAGE technique, HMW-GS of Thinopyrum were detected by analyzing Thinopyrum accessions, wheat-Th. elongatum 1E〓 substitution lines and wheat-Th. intermediam partial amphidiploid Zhong2. It was showed that the composition of HMW-GSs of Thinopyrum were distinctly different from which in wheat.

对偃麦草、二倍体长穗偃麦草1E中国春代换系、小麦—中间偃麦草部分双二倍体中〓高分子量谷蛋白亚基进行了SDS-PAGE分析，发现在偃麦草材料中存在不同于小麦的特异HMW-GS类型。

The chromosome composition of Yuan Zhong 2, a common wheat-Ag.intermedium partial amphiploid (2n=54), was analyzed with the genomic in situ hybridization,in which the biotinylated total DNA of Ag.intermedium as the probe and the total DNA of common wheat cv.Chinese Spring as blocking DNA were used to hybridize with the chromosome DNA of Yuan Zhong 2 at mitotic metaphase in root tip cells.

为分析普通小麦-天兰冰草部分双二倍体-远中2号(2n=54)的染色体构成，用生物素(biotin-16-dUTP)标记天兰冰草染色体组DNA作为探针，以普通小麦品种中国春染色体组DNA为封闭DNA，与远中2号的有丝分裂中期染色体DNA进行了分子原位杂交。

Research on biosynthetic pathway of plant amylopectin holds great promise for modifying the structural composition of amylopectin and being used in food industry.

对植物支链淀粉生物合成途径及其代谢酶基因的研究，可大大推动支链淀粉结构的改造和在食品工业上的应用。

I walked onstage and played a composition on an old upright piano.

我走上舞台，在一架老竖式钢琴上演奏了一首乐曲。

In Chapter 5, we study composition operators on some vector-valued analytic function spaces.

第五章研究了向量值解析函数空间上的复合算子。

In this research report, we mainly study the boundedness, compactness, weak compactness and other properties of composition operators on some analytic function spaces.

在本报告中，我们主要研究了一些全纯函数空间上复合算子的有界性，紧性，弱紧性和这种算子的一些其它性质。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。