开卷有益的英文：
[Literal Meaning]
open/book/beneficial
To open a book is beneficial.

[解释]
打开书来看就会有收获。

[Explanation]
Reading is a rewarding experience.

[例子]
开卷有益，每个月读一本书，一年下来你就会有很多新的知识。

[Example]
Reading is a rewarding experience. If you read a book every month, after a year you will have a lot of new knowledge.

Great books are the most readable. They will not let you down if you try to read them well.
名著隽永耐读。如果读法得当，你就会感到开卷有益。