I think he lives here. I've seen him walk up and down the street a few times.

我想他住在这儿。我在路上见过他几次。

演艺人居住的街区 - SpeakingMax英语口语达人

So what would I want to do? I'd like to somehow walk down each of the digits one at a time and add them up. Ah, that's a looping mechanism, right? I need to have some way of walking through them.

去取这个数的,每个数字然后把他们加起来,啊，这是个循环机制对不对？,我得找到一个遍历它们的方法,一种简单的方法可能。

麻省理工公开课 - 计算机科学及编程导论课程节选

but just to walk up and down like Canal Street, different streets like that,

到类似坚尼街的街上走走，

推荐购物街 - SpeakingMax英语口语达人

You need to walk down the stairs and then up the stairs.

要被迫上下楼。

哈佛公开课 - 幸福课课程节选

Actually, I had to, a lot of the time, I had to walk down the street and go up to people and ask them questions.

实际上，很多时候，我得走上大街，找人问问题。

在超市遇到的人 - SpeakingMax英语口语达人