钢筋混凝土桥腐蚀破坏,系由于防冰盐 、 海盐和环境污染的作用. Steel - reinforced concrete bridges are deteriorating from the corrosive effects of de - icing, marine salts, and environmental pollutants.
The striker's rich vein of form this season has seen him net 32 goals...这位前锋本赛季状态奇佳，进球已达到32个。The striker was unable to find his scoring touch.那个前锋找不到进球的感觉。Striker Alan Smith was guilty of two glaring misses.前锋艾伦·史密...
Cold cathode sensing tubes are more rugged than the glass, hot - filament tubes.冷阴极传感管比玻璃热丝管坚实.The source of electrons in an electron microscope is a heated filament.电子显微镜中的电子源,是一加热的灯丝.Tropomyosin adds structural rigidit...
单支红色发光二极管表示电源已接通。A single red LED shows that the power is switched on.按这种方式使用的二极管叫做整流管.A diode used in this manner is called a rectifier.二极管早已作为常规器件应用于多种电路中.The diode is used routinely in many kinds of electronic circuit...
The collapsar model of gamma - ray bursts. Click on the image to view a 5 MB animation.γ射线爆发的黑洞模型. 那个5MB动画下载见下一楼.Magnetotactic bacteria ( MB ) belongs to Mycetozoan class with simple prokaryotic cell.趋磁细菌 ( MB ) 属变形菌纲,为简...
The window frames had begun to warp.窗框已经开始变形。There is a warp in this record.这张唱片有点翘曲变形了.The shuttle moves backwards and forwards through the warp.梭子在经线中来回移动....