1·He keeps studying hard.
他一直努力学习。
2·Hitting the books just means that you are studying hard.
Hitting the books 只是表示你在努力学习。
3·By studying hard I catch up with the others of the class.
通过努力学习，我终于赶上班里的其他的同学了。
4·Only by studying hard continuously can we promise ourselves a good future.
只有不断努力学习，我们才能许诺自己一个美好的未来。
5·I had a lot of tension while you've been studying hard on your course in D.C.
当你在华盛顿努力学习的时候，我感到压力很大。
6·Well, I had a lot of tension while you've been studying hard on your course in D.C.
当你在华盛顿努力学习的时候，我很紧张。
7·I persuade him into studying hard so that he can realize his dreams and live a better life.
我劝说他努力学习，这样他才能实现梦想，过上更好的生活。
8·You have been studying hard, so there's no need for you to get into a panic about the exams.
你一直都很努力学习，所以没有必要为考试而陷入恐慌。
9·After studying hard for months, you must be bored and tired.
刻苦学习了好几个月，你一定又烦又累。
10·If you keep on studying hard, gradually you will make progress.
如果你继续努力学习，你会渐渐地进步。