I prefer a lower berth when traveling by train.

我在乘火车旅行时更喜欢下卧铺。

Would you like an upper berth or a lower berth?

您喜欢上铺还是下铺？

Do you prefer an upper or a lower berth?

你想要上铺还是下铺?

And which berth do you want, the upper berth or the lower berth?

那么您想要哪个铺位，上铺还是下铺？

Yours is a lower berth, and mine is an upper one.

你的铺位是个下铺, 我是个上铺.

Yours is a lower berth , and mine is an upper one.

你的铺位是个下铺，我是个上铺。

I reserved the lower berth , so that I could enjoy the beauty of out side from the moving train.

我预购了下铺的车票，如此一来，火车向前行驶的时候，我就可以欣赏窗外的风景了。