It actually means @keep in touch.
应该说“保持联系。”
I will. Please keep in touch.
我会的。希望保持联系。
You know, we should try to stay in touch.
我们应该常保持联系。
I will be in touch with you
我会跟你保持联系。
We'll keep in touch with you.
我们将和你保持联系。
You 'll stay in touch, will not you ?
你会保持联系，不是吗？
You have to keep in touch with your parents.
你必须和双亲保持联系。
kept in touch with several classmates
和几位同学保持联系
Please keep in touch with me any time.
请随时与我保持联系。
Take care of yourself and don't forget to keep in touch.
多保重，不要忘了保持联系。
Have you been keeping in touch with your financial sponsor?
你和你的担保人保持联系吗？
We have been keeping in touch with each other by email since he left China.
他离开中国以后，我们用Email保持联系。
We now keep in touch with him by writting letters .
我们现在靠写信与他保持联系。
They talked until dawn, and have stayed in occasional touch.
现在，他们还偶尔保持联系。
Best wishes always. Keep in touch, sister.
祝你永远幸福。保持联系,姐姐。
He didn't stay in touch. Neither did she.
他没和她保持联系,她也没有。
I must keep in contact with my lawyer
我必须与我的律师保持联系。
hold [keep up] correspondence with sb
与某人（保持）通信（联系）