He went up to the roof and looked over the east ledge他上了屋顶 ，向东边的窗台张望

go up to走上前去

He went up to her to ask her for a dance.

他走到她跟前，请她跳个舞。

look over检查；查看；调查

I think it is compulsory to look over the house.

我认为检查这栋房子势在必行。

Look over the exercises before handing them in.

把练习再检查一遍。

You think somebody paid him off你认为有人收买了他

pay off偿清(欠款等)；贿赂；取得成功；有报偿，得到回报

Both had reneged on paying off the loan.

两人都违背了还清贷款的诺言。

We must pay off the mortgages this year.

我们今年必须还清这笔抵押借款。