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The compounds, in which it has valence 2, are used as insulators and refractories and in fertilizers, cement, rubber, plastics, foods, and pharmaceuticals (antacids, purgatives, laxatives).

在二价化合物中，镁被用作绝缘体和耐火材料；也用于化肥、水泥、橡胶、塑料、食品和药物。

Sufficient basis functions are used to describe the core and valence orbitals of the system.

足够的基函数用来描述体系的内层和价轨道。

Utilizing this model, thedistributions of valence nucleons are calculated for some light nuclei. Some new haloor skin states are predicted.

利用该模型，计算了一些轻核外层核子的分布，预言了一些尚未发现的晕、皮核态。

For the spherical shape nuclei, we mainly study the phenomenon of halo. Halo is very common. The main characters of halo are that the valence nucleons are weekly bound and there are large matter root-mean-square radii of nuclei.

在对球形核的讨论中，主要研究了晕现象，晕现象是一种普遍现象，它的主要特征是有弱束缚的价重子以及大的物质半径等。

Since Al〓Ga〓In〓P possesses larger valence band difference to GaAs and wider energy gap, minor carrier reverse injection from base and space charge region recombination in the emitter are effectively suppressed in Al〓Ga〓 In〓P/GaAs HBT. Under most circumstances, quasi-neutral base recombination current dominates the base current, and its ratio to collector current varies little with collector current and temperature, thus greatly stabilizes the current gain.

Al〓Ga〓〓In〓P/GaAs HBT由于异质结的△Ev较大，发射区禁带较宽，有力地抑制了基区少子反向注入流和发射区空间电荷区复合电流；在大多数情况下，基极电流以准中性基区复合电流为主，其与集电极电流的比值随集电极电流和温度的变化极小，稳定了电流增益。

"Titanium Goose Ceramic High Speed Rail under the ceramic production 'K2O-Al2O3-SiO2′ ternary system phase diagram and the iron titanium oxide in different color under the conditions of the principle of green glaze recipe for technological innovation so that billet, at the end of the glaze, glaze surface three raw materials as close as possible to the expansion coefficient, at a high temperature reduction firing, the control FeO/Fe2O3 proportion and coloring oxides of different valence state to develop a cream-colored,棕红, brown, light窑变blue color, and simplicity of natural color, green color and窑变color white, color, soft, short thick matching, contour lines of fresh, rich European-style."

&下的陶瓷生产'鹅钾钛陶瓷高速铁路- Al2O3 - SiO2系'三元体系相图，并根据绿色原则的条件不同颜色铁钛氧化物釉配方技术创新，使钢坯，在在釉底，釉表面3尽可能的膨胀系数在高温还原烧成，接近原料，不同价态的控制FeO/Fe2O3比例和着色氧化物发展米黄，棕红，棕色，蓝色光窑变，和自然的颜色，绿色和窑变颜色有白色，彩色，软，短厚匹配，新鲜，丰富的欧洲风格的轮廓线简单。&

Such a structure shows the arrangement of valence shell electrons within the molecule.

这种结构表明了分子内外层价电子的排布。

Experience the application of valence shell electrons pair of repulsion theory.

体会价电子对互斥理论的运用。

Exploring the idea of valence shell electrons pair of repulsion theory.

探究价电子对互斥理论的思想。

Halogen atoms contain seven electrons in their valence shell .

卤原子在它们的介电子层含有七个电子。

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