The cat was on the wall, watching for birds.

　　那只貓在墻上伺機(jī)捕捉鳥兒。

　　I pinned the notice up on the wall.

　　我把通知釘在墻上了。

　　The sign on the wall said 'Now wash your hands'.

　　墻上的牌子上寫著“請洗手”。

　　Let me fire up another window.

　　讓我再打開一個窗口。

　　Maximize the window to full screen.

　　將窗口最大化。