He worked sixteen hours a day.

　　他每天工作16個(gè)小時(shí)。

　　We talked for hours and hours.

　　我們談了好多個(gè)小時(shí)。

　　What are your office hours ?

　　你的辦公時(shí)間是幾點(diǎn)到幾點(diǎn)？