erode和corrode的区别

　　Once exposed, soil is quickly eroded by wind and rain.

　　一旦暴露在外，土壤很快就会被风雨侵蚀。

　　This rock has been weathered and eroded.

　　这块岩石经风吹日晒已被侵蚀。

　　Corruption corrodes public confidence in a political system.

　　腐败可削弱公众对政治制度的信心。

　　Acid corrodes metal.

　　酸腐蚀金属。