例句：
Wine contains about 10% alcohol.
葡萄酒含有約10%的酒精。
He's very intense about everything.
他對一切都很熱心。
It's about 2 metres wide.
它大約2米寬。
He looked about the room.
他在房間里四下看了看。
I'm definite about this.
我對這事毫無疑問。
You're completely mistaken about Jane.
你對簡的看法完全錯(cuò)了。