[Grammar] Which one is right？

[nearsara]

Dear teachers，
I’ve got a question troubling me a lot. When I read some English magazines and some books, I found that some people use “on one hand” and some people use “on the other hand” in similar situations. Even when I enumerate some reasons for some phenomena, I am confused which one is right. For example, when I am describing different aspects of a problem, I will use “on one hand/ on the hand” and “on the other hand”.
I want to know which one of “on one hand” and “on the other hand” is the only correct in English or is preferable to native speakers of English. And is there some difference between them?
I would appreciate it if you could help me.
Best wishes,
Sara

 

[Rover_KE]

Check with your classmates on the next school day.

Most of them have asked the same question here in the last few days.