例句：
It is important to keep in touch with the latest research.
及时掌握最新研究情况很重要。
Above all, keep in touch.
最要紧的是保持联系。
They embraced and promised to keep in touch.
他们互相拥抱，许诺将保持联系。
We're a tight group, so we do keep in touch.
我们关系很铁，所以的确保持着联系。
She's still keen to keep in touch
她仍旧很愿意保持联系。