Children tend to rely on concerned school friends to keep in touch with school work.

孩子们倾向于依靠有关的学校朋友来保持与学校工作的联系。

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Some people think that best friends should share all their secrets with one another without reserve while others believe that even best friend should keep some distance.

一些人认为最好的朋友之间应该毫无保留地分享彼此之间所有的秘密，而另一些人认为即使是最好的朋友也应该保持一定的距离。

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How many of your old school friends do you keep up with?

你与多少老同学保持着联系？

《牛津词典》

Many people use E-mail,blogs,text messages and social Web sites like Facebook to keep in touch with their friends.

VOA: special.2009.02.06

I think it's in part that, suffering from lupus, she was very much confined to her house in Georgia, and the letter writing, this kind of correspondence, was certainly a way for her to keep in contact with the world of readers and other writers and friends.

我想这多少与她，受病痛的折磨有关，受制于病情，她只能呆在,乔治亚州的家里，足不出户，所以写信，必然是她和读者、,其他作家和朋友联系的方式。

耶鲁公开课 - 1945年后的美国小说课程节选

How do you keep in touch with your friends?

你怎么和你的这些朋友保持联系呢？

一起长大的朋友 - SpeakingMax英语口语达人

People come to them to keep in contact with friends and relatives, play games, or carry out business.

BBC: Internet in the Amazon

It empowers each of us who use it to keep in touch with friends and family, promote our persona, etc.

FORBES: One Network To Rule Them All

Today, a good chunk of the planet logs in to the site regularly to keep in touch with friends and family.

FORBES: 12 Rules For Game-Changing Entrepreneurs