Definition
used to indicate the significant extent or degree of a particular quality someone or something possesses.
很能说明，充分显示
It says a lot for his ability that he managed to complete such a challenging task in such a short time.
他在如此短的时间内完成了如此具有挑战性的任务，这充分说明了他的能力。
It says a lot for the quality of the food that this restaurant is still very popular among the locals.
这家餐厅在当地仍然非常受欢迎，这充分说明了食物的品质。
It says a lot for her perseverance that she still managed to finish her studies despite many difficulties.
尽管遇到了许多困难，她仍然完成了学业，这充分说明了她的毅力。