There was a difference of opinion over who had won.
在誰獲勝的問題上發生了爭執。
In my opinion, it's a very sound investment.
依我看，這是十分可靠的投資。
You seem to have a high opinion of yourself!
你似乎自我評價很高嘛！
The boss has a very high opinion of her.
老板對她評價很高。
She has a very low opinion of her own abilities.
她認為自己的能力很差。