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区别：in the wall指在墙里面，on the wall在墙表面。in the wall与on the wallin the wall指在墙里面比如，there is a window in the wall.墙上有个窗户on the wall在墙表面There is a picture on the wall.墙上有张画wall双语例句Kathryn leaned against the wall of the church凯瑟琳倚靠在教堂的墙上。He sat on the wall in the sun他坐在墙上晒太阳。He ran his fingers along the inside walls of the box.他用手指摸了摸盒子的内壁。She gazed at the wall of books她目不转睛地盯着书墙。The police say they met the usual wall of silence警方称他们像往常一样碰了壁，没人吭气。