erosion

1. N-UNCOUNT Erosion is the gradual destruction and removal of rock or soil in a particular area by rivers, the sea, or the weather. 侵蚀

...erosion of the river valleys. …河谷的侵蚀。

2. N-UNCOUNT The erosion of a person's authority, rights, or confidence is the gradual destruction or removal of them. 削弱

...the erosion of confidence in world financial markets. …对世界金融市场信心的削弱。

3. N-UNCOUNT The erosion of support, values, or money is a gradual decrease in its level or standard. 逐渐降低

...the erosion of moral standards. …道德水准的逐渐降低。