a moment later

  区别：in the wall指在墙里面，on the wall在墙表面。

  in the wall与on the wall  in 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。