工程师说钚可能会开始从遭腐蚀的潜艇往外渗透。Engineers said that plutonium could begin seeping from the corroded sub.危险的辐射物从钚放散出来.Dangerous emissions radiate from plutonium.钚也可以用来制成核武器.The plutonium also could be used, however, to make nuclear...
Percy's enchant-ment with orchids dates back to 1951.珀西对兰花的痴迷可以回溯到1951年。Percy was lying prostrate, his arms outstretched and his eyes closed.珀西闭着眼四仰八叉地平躺着。Percy's enchantment with orchids dates back to 1951.珀西对...