对某事有更好的理解用英语怎么说

"To have a better understanding of something" 可以用 "to grasp something more deeply" 来表达。
这个短语的来源可能源于 "grasp" 这个动词本身，其有 "to take hold of something firmly with the hand" 的意思，在这里它表示对某事物有更深入的理解。
例句：
Reading the book helped me to grasp the concept more deeply. (通过阅读这本书，我对这个概念有了更深入的理解)
She needed more time to grasp the material more deeply. (她需要更多时间来更深入地理解这些材料)
He wants to grasp the culture more deeply before he makes any decisions. (他想在做出决策之前更深入地了解这个文化)