It was a big, round room with a high arched roof, and the walls and ceiling and floor were covered with large emeralds set closely together.

一个很大的圆屋子，盖着高拱形的房顶，无论是四周的墙壁，还是天花板和地板，都用大翡翠紧密地接连着的。

These big wagons, with their tall, arched cloth roofs, became icons of America's westward expansion as they carried the belongings of pioneers from the east out to the frontier.

这些大马车，拥有高高的拱形布顶，成为美国向西扩张的象征，它们载着东部先驱者们的所有物出发前往边疆。