当你意识到(事实上你非常清楚，因为几乎是每两秒钟你就要看一下表)自己为此浪费了20分钟的宝贵时间，并且已经迟到的时候，不由得气塞填胸。

Before you know it (actually you do know it because you look at the clock about every 2 seconds) you have wasted 20 minutes of your valuable time and now you are late, angry and infuriated.

youdao

当你意识到(事实上你非常清楚，因为几乎是每两秒钟你就要看一下表)自己为此浪费了20分钟的宝贵时间，并且已经迟到的时候，不由得气塞填胸。

Before you know it (actually you do know it because you look at the clock about every 2 seconds) you have wasted 20 minutes of your valuable time and now you are late, angry and infuriated.

youdao