写作：One possible version:
In the picture, four people are trying to fill a vat with water. Two men are carrying water while two others are pouring water into the vat. However, with so many loopholes at the bottom of the vat, they’ll never store any water, because no one tries to mend the holes.
It reminds me of the problems in our study. While studying, we always try to read more books and do more exercises. However, we seldom pay attention to the mistakes we’ve made, nor do we try to correct them. Therefore, ―holes‖ are left. Day by day, there appear more and more ―holes‖, or rather the shortages. No matter how many books we’ve read, we have never mastered any knowledge because they have leaked out through the hole.
So we should pay attention to the mistakes we’ve made and the holes we have in our study. Only in this way can we learn much knowledge and fill up our mind with it.