She walked up and down, flapping her arms to keep warm.

她来回走动，挥动着双臂使身体暖和起来。

《牛津词典》

I was finishing the job when my mum walked up and stopped me.

我正在完成工作，这时我妈妈走过来拦住了我。

youdao

She put the key in her pocket and walked up and down her walk.

她把钥匙放在她的口袋里，走来走去。

youdao

Then he got up, found a long stick and walked up and down the river bank.

VOA: special.2010.06.26

Look out!" Some ten paces away Lolita through a glass at a telephone booth, membranous god still with us, cupping the tube confidentially, hunched over it, slit her eyes at me, turned away with her treasure, hurriedly hang up and walked out with a flourish.

注意！“十步开外洛丽塔透过电话间的玻璃正用手,握着话筒，万分信赖的说着什么，她的目光扫到我，拿着她的宝贝转过身去，急忙挂上，一个戏剧性的夸张动作，走了出来。

耶鲁公开课 - 1945年后的美国小说课程节选

The first one was kind of, just like a meet up and like we grab lunch and then walked.

我和第一个相亲对象只是见了一次面，我们一起吃午餐，然后一起散步。

体验男女初次会面 - SpeakingMax英语口语达人

The policemen with their dark uniforms walked up and down trying to spot trouble.

FORBES: Santa Arrived Too Late

We walked up and the down the aisle at Rouse's grocery store near my house.

CNN: Blog: Living on Food stamps

Three times therefore he walked up and down at the edge of the sea.

ECONOMIST: Bill Millin