火车的前部车厢是预留给一等座乘客的。

The front ___carriage of the train is reserved for first-class passengers.

为了漫长的过夜旅程，我们在卧铺车厢预订了一个隔间。

For the long overnight journey, we booked a compartment in the sleeping ___carriage.

请在这个安静车厢内小声说话。

Please keep your voice down in this quiet ___carriage.