They are often lost in thought, lost in a book or an activity to the point where they do not register their surroundings.
他们常常会陷入沉思、沉浸在一本书或一个活动里，以至于忘却了周围的其他事物。
2
I do not play tricks, the next few rounds we lost win win or lose in the final round of the match, Rui Qi riding accidentally lost a shoe, makes me laugh!
It doesn't matter where you are, in the jungle or the desert or the moon. However lost you may feel, you'll never really be lost. Not really. Because I'll always be here.