erosion
n[U]
process of eroding or being eroded 侵蚀; 腐蚀
the erosion of the coastline by the sea 海水对海岸的冲刷
attempts to reduce soil erosion 减少土壤侵蚀的做法
(fig 比喻) the steady erosion of the President's credibility 总统的威信日渐丧失.
OK. We can get some more tomorrow. We should finish the floor now. Can you take the other end of this piece of wood? Now you have to pull it to make the surface smooth like that.
Next, if it is not a story, get an idea of the organization of the book. Read the back cover and the introduction. Look at the pictures and the short texts below them. Turn to the front of the book and look at the contents. This way you can decide whether