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.
They will be helped by the very latest in navigation aids.他们将会受益于最新的导航系统。Pack ice around Iceland was becoming a threat to navigation.冰岛周围的浮冰群曾一度对船只航行构成威胁。a laser navigation device激光导航装置...
对于应该采取什么正确步骤，还是有些不明确。There is some confusion about what the correct procedure should be.已采取步骤使某些软毒品合法化。There are moves to decriminalize some soft drugs.按照别人建议的行动步骤而行动就是自找报应.To follow the proposed course of action is to i...
This paper studies the Pntimi _ zation of the composition and production process of intensified lactulose milk powder.要本文探讨了强化乳酮糖奶粉的最优化配方及最佳工艺流程.Furthermore , the rats of treatment group were given lactulose after 8 week...