I get up early this morning. I get up early this morning. I saw the dawn on the top floor of our building. It's beautiful. Weather forecast said it would be sunny today. I have a good mood to remember more English words today. Come on!

What's the difference between "comprehend" and "understand"? How can I use them properly?

How to make a distinction between the father of father and the father of mother in English? Are there any words besides the grandpa?

Introduce myself. I am a graduate student of computational chemistry, and I want to study abroad next year. I am willing to go to Germany and learn how do people with a reputation of rigor do the science research.