It's a two - component , reinforced etch primer, containing phosphoric acid and corrosion - inhibitive pigments.一种含有磷酸和 防腐蚀 颜料的双组份加强型磷化底漆.OBJECTIVE To discuss the inhibitive activity of proteinase of hypoxic cells r...
Drivers must be on the alert for traffic signals.驾驶员必须密切注意交通信号.They were constantly on the alert not to be taken by surprise.他们一直处于常备不懈状态以防突然袭击.Hearing this, I was instantly on the alert.我一听这话, 当下就警惕起来....