keep in touch的用法和样例：
- I try to keep in touch with current events by reading the newspapers.
- Wherever you go, keep in touch with me, please.
- Keep in touch!
- Explorers in remote areas, ships at sea, even astronauts circling the earth axe able to keep in touch with civilization by means of radio.
- He express the hope that we will keep in touch with his firm.
- Let's keep in touch.