You must fasten your seatbelt during the entire flight.

整个飞行过程中你必须系好安全带。

同一单元的其他句子

• The train to Beijing leaves at nine in the morning.去北京的火车早上九点出发。
• Where can I buy a ticket for the subway?我在哪里可以买到地铁票？
• Don't forget to bring your passport when traveling abroad.出国旅行时别忘了带护照。
• We are going to take a taxi to the airport.我们打算乘出租车去机场。
• The flight was delayed because of the heavy rain.由于大雨，航班延误了。