a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals
bis-的用法和样例:
例句
Six dimethylsilyl bis -- enol ethers of aldehydes aresynthesized and the yields are good. 合成了六个醛的二甲硅基双烯醇醚,产率较高。