1. He did not understand the importance of this question. 他不理解这个问题的重要性。
2. Do you see it?Do you understand? 你经常见到他吗?)(你明白了吗?
3. How to say you do not understand. 不理解的情况下你该如何讲。
英英解释
v.
1. know and comprehend the nature or meaning of
2. perceive (an idea or situation) mentally
3. make sense of a language
4. believe to be the case
5. be understanding of