例句：

　　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(duì)這事毫無疑問。

　　You're completely mistaken about Jane.

　　你對(duì)簡的看法完全錯(cuò)了。