金属的

BC. The beginning of the period is sometimes called the Chalcolithic (Copper-Stone) Age, referring to the initial use of pure copper (along with its predecessor, stone).

青铜时代伊始阶段，有时称作石器－青铜时代，以表示纯铜金属的开始用于工具制造。

Charge and energy transfer ; Electron-hole coherence ; Indoline dyes ; Metal-free for dyesensitized solar cells

电荷和能量转移；电子空穴相干性；吲哚染料；无金属的染料敏感太阳能电池

Metals have important mechanical properties one of which is their machinability.

加工性是金属的重要性能之一。

The overlength anticeptic enamel spiral finned tube is an enamel heat-transfer element of a new type,which overcomes the shortcomings in using stainless steel for pipe bundles,meets the needs of environmental protection, and has a wide market prospect.

超长防腐搪瓷鳍片管是新一代搪瓷传热元件，改进管束采用不锈钢等金属的缺点，降低成本，延长寿命，外表美观大方，并达到环保要求，市场前景十分广阔。

Pelting rain of iron and mercury, the earth is burning up and writhing...

金属的急雨，地球正在被燃烧，扭曲

These CRM's are for analysis of metal by spectrochemical methods.

此类标样用于金属的光谱分析。

The plastic flow of the two component metals was compared with that of the extrusion for bimetal bonding.

基于Oyane韧性断裂准则，针对不同挤压工艺参数条件下芯层金属的韧性断裂进行了分析和预测。

This pure gold is commonly alloyed with other metals in increase its hardness and decrease its cost.

这纯黄金通常与其他金属的合金，在提高其硬度和降低其成本。

Suited for the rough polishing of all metal , such as the stainless steel, assorting the yell..

适合不锈钢等一切金属的粗磨，配合黄腊或紫腊使用。

It was the news of China's metal detonated crisis.

正是这一消息引爆了中国金属的危机。

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。