例句：
It's about this high.
大约有这么高。
It will take about an hour to get there.
到那里大约需要一小时。
We estimated it would cost about € 5 000.
我们估计要花费大约5000欧元。
It's about that long.
大约有那么长。
It'll take about three weeks, give or take a day or so.
这要花大约三周时间，出入不过一天左右。
