1.Long time no see。2.It&#39；s been a while since we last met。3.It has been quite some time since our last encounter。4.It&#39；s been a long time since we&#39；ve been in touch。下面详细介绍这些表达方式。第一种表达&ldquo；Long time no see&rdquo；是一种非正式用语，通常用于口语交流或社交媒体中，简洁明了地表达了很长时间没有见面的意思。这种表达方式在年轻人中非常流行，带有一定的亲切感。