It's sad when people you know become people you knew。

当那些曾经熟悉的人变得不再熟悉，那是多么哀伤。

When you can walk right past someone like they were never a big part of your life。

曾经他们是你生命中一个重要的部分，而现在，你经过他们也不打招呼;

How you used to be able to talk for hours and how now, you can barely even look at them。

曾经你们能畅谈许久，而现在，你甚至都不再看他们一眼;

It's sad how times change.

时光流逝，是多么悲哀。