I lose track of time.

我忘记了时间。

His reverie made him lose track of time.

他的白日梦让他忘记了时间。

Binge-watching made him lose track of time.

追剧让他忘记了时间。

It's easy to lose track of time when you shop in a large mall like this.

在如此大型的购物中心购物是很容易忘记时间的。

Flow occurs when you are so engrossed in an activity that you forget about your worries and lose track of time.

当你聚精会神地投入到一项活动中的时候，你忘记了烦恼，忘记了时间，这个时候“流动的你”就出现了。

If you were so immersed in anything and not aware of the time passage recently, what were you doing when this happed to you ?i mean, what makes you lose track of time, if any?

如果你也有为某件事沉浸其中不能自拔的时候，那通常都是为了干什么呢？