It will take about an hour to get there.
到那里大約需要一小時。
I should imagine it will take about three hours.
我想得用差不多三個小時吧。
It'll take about three weeks, give or take a day or so.
這要花大約三周時間，出入不過一天左右。
The journey was reckoned to take about two hours.
路上估計要花大約兩個小時。
It will take about an hour to get there, allowing for traffic delays.
考慮到交通阻塞，到那里大約需要一小時。