Classic flow experiences have this quality.

经典的心流体验就具有这种品质。

You know, sometimes when I start working on a project I could be doing it for hours and have no conception of how much time has gone by—what some people call a flow experience.

你知道，有时当我开始做一个项目时， 我可能会做几个小时并且不知道已经过去了多少时间——有些人称之为心流体验。