President Trump says he plans to sign an order next week that could lead to the large-scale detention of migrants along the southwest US border.

特朗普总统表示，他计划下周签署一项命令，可能导致美国西南部边境大规模拘留移民。

Starting in the Americas, we  have the Mojave desert of the Southwest US, covering inland areas of Southern California, Southern Nevada and much of Arizona.

从美洲开始，我们有美国西南部的莫哈韦沙漠，覆盖南加州、内华达州南部和亚利桑那州大部分地区的内陆地区。