0 to understand something completely -- 充分理解；领悟
He doesn't seem to comprehend the scale of the problem 他似乎没意识到问题的严重性。
[ + question word ] I'll never comprehend why she did what she did. 我永远也不会明白她为什么那么做。
[ + that ] I don't think he fully comprehends that she won't be here to help him. 我看他还没有充分意识到她是不会来这里帮他的。
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路，一步步也能走完，再短的路，不迈开双脚也无法到达。
