It never takes more than an hour.

　　所用的時(shí)間從不會(huì )超過(guò)一個(gè)小時(shí)。

　　I waited an hour just to see you.

　　我等了一個(gè)小時(shí)只是為了見(jiàn)你。

　　They were doing 70 miles an hour.

　　他們每小時(shí)達到70英里。