Definition
To communicate or maintain communication with someone, typically through phone calls or writing.
保持联系
Since graduation, I've managed to stay in touch with a few of my college roommates.
自从毕业后，我一直与几位大学室友保持联系。
Even though they moved far away, we try our best to keep in touch.
尽管他们搬到了很远的地方，我们还是尽力保持联系。
Our company stays in close touch with its suppliers to ensure all processes run smoothly.
我们公司与供应商保持密切联系，以确保所有流程顺利进行。