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Of various biaryl alkynes under mild condition by an easy-to-handle complex 4 in unpurified solvents of regent grade quality.

此反应可将两当量的DMAD分子和一当量各式各样双芳香环取代的乙炔分子在空气下进行一个环化反应,并且可使用未经纯化过的试药级溶剂。

We want to buy Bio-Technology Products, Reagents and Supplies, Tooth Paste and Tooth Brush

我们要采购生化技术产品,试药和用品,牙膏和牙刷

Continue until a final addition of Dithizone Titrant is green in color after shaking.

继续,直到双硫腙滴定试药的最后的加法是绿色的在颜色在以后shaking。

MERCURY SOLUTION FOR STANDARDIZING DITHIZONE TITRANT : Transfer 2.0 mL of Mercury Stock Solution to a 100-mL volumetric flask, and dilute with 1 N sulfuric acid to volume.

规范化的双硫腙滴定试药MERCURY解答:调动2.0 mL水星 Stock解答到100ml容量瓶,和用1 N硫酸稀释对容量。

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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。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。