例句：
事实很明显，没有人真正了解。
The plain fact is that nobody really knows.
医生对这种疾病还了解不多。
Doctors still don't understand much about the disease.
据我了解，会议是在星期四。
It is my understanding that the meeting is Thursday.
乔治对世界的了解令她倾倒。
George dazzled her with his knowledge of the world.