查询词典 protactinium

All are radioactive heavy metals; and only the first four (actinium, thorium, protactinium, and uranium) occur in nature in appreciable quantities. The other 11 are unstable and are produced only artificially.

这些元素都是具有放射性的重金属；仅前四个元素是在自然界中存在的，其余十一个都不稳定且均为人造的。

Anticipate in the color and the noodles up, spread trend according to this year, chose to return protactinium to return true green to be fond of colourful noodles to anticipate;Design in the style up, use to turn province, ground plait, curve to highlight the female's beautiful curve, pass to put together to connect, the dissymmetry, bowknot, satin bring exceedingly fascinating and charming of expressing the modern youth young girl, can then strengthen the function of the clothing by the function of transformation length.

在色彩和面料上，是根据今年流行趋势，选择了返镤归真的绿色迷彩面料；在款式设计上，用转省、碎褶，弧线来凸显女性的曲线美，通过拼接、不对称、蝴蝶结、缎带来表现现代青春少女的风情万种，可以变换长短的功能性则增强了服装的实用性。

Protactinium was radiochemically separated from the irradiated targets.

用放射化学方法从被照射的靶中分离出镤。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。