There was a difference of opinion over who had won.
在谁获胜的问题上发生了争执。
In my opinion, it's a very sound investment.
依我看，这是十分可靠的投资。
You seem to have a high opinion of yourself!
你似乎自我评价很高嘛！
The boss has a very high opinion of her.
老板对她评价很高。
She has a very low opinion of her own abilities.
她认为自己的能力很差。