to keep communicating regularly with someone
регулярно общаться с кем-то (regulyarno obshchatsya s kem-to)
"I stay in touch with my college friends through video calls."
"Я stay in touch with своими друзьями из колледжа через видеозвонки." (Ya **stay in touch with** svoimi druz'yami iz kolledzha cherez videozvonk)
to appear or seem to be something
to begin a new business or project
to organize work or tasks to accommodate other activities or...
to mention or direct attention to something mentioned earlie...
to gradually stop using or producing something
to stay updated with the latest developments or innovations