以下是關於友情的格言的英文：
1. Friendship is like money - it is best not to have too much of it, or else it will be lost.
2. A friend is known in times of adversity.
3. A true friend sticks closer than a brother.
4. Friendship is like money - it must be handled with care.
5. A friend in need is a friend indeed.
6. Friendship is the greatest thing there is.
7. Friendship is like a plant which requires care and culture to succeed.
8. A friend who can be silent with you in a crowd is a true friend.
9. Friendship is a bridge of understanding, tolerance and love.
10. True friendship is like gold – it is valued and treasured even when it is not seen.