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。