Spectinomycin is a kind of antibiotics with alkalescence and water - solubility . It is also called actinospectacin.大观霉素(spectinomycin)又称奇放线菌素或壮观菌素(actinospectacin),是一种碱性 水溶性 抗生素....
这座天主教堂的拱顶非常高.The vault of this cathedral is very high.那座教堂的屋顶是拱顶.The church has a vault.拱顶处剪力的影响线可按类似方式得到.The influence line for shear at the crown can be obtained in a similar manner....