Definition
To be in touch with something means to have current knowledge of it, while to be out of touch means to not have current knowledge.
掌握／不掌握最新资讯（最新情况）
Despite his attempts to fit in with younger people, he is still out of touch with current trends.
尽管他试图融入年轻人，他仍然不了解当前的趋势。
She reads industry news regularly, so she is very much in touch with the latest developments.
她经常阅读行业新闻，因此非常了解最新的发展。
Since retiring, he's found himself becoming out of touch with advancements in technology.
自从退休后，他发现自己逐渐不了解科技的进步。