It's all settled ─ we're leaving on the nine o'clock plane.

　　一切都定下來了——我們乘九點的航班走。

　　When Mary didn't come by nine o'clock, we gave her up.

　　瑪麗九點還未到，我們認為她不會來了。

　　You'll have your work cut out to get there by nine o'clock.

　　你九點鐘前趕到那里可不容易。

　　The food, such as it was, was served at nine o'clock.

　　那飯雖說是粗茶淡飯，卻到九點鐘才端上來。

　　It's exactly nine o'clock.

　　現在是九點整。