这幅来自NASA火星轨道观察器的图像显示了位于火星南方高地巨大的Hellas撞击盆地北侧地表上的一个大撞击坑。
This observation from NASA's Mars Reconnaissance Orbiter shows the floor of a large impact crater in the southern highlands, north of the giant Hellas impact basin.
墨西哥南方边界全长960公里,在遥远的高地和茂密的丛林里蜿蜒前进,巡逻任务非常艰难。
Mexico’s southern border stretches for 960km (600 miles), snaking through remote highlands and thick jungle. Patrolling it is hard.
墨西哥南方边界全长960公里,在遥远的高地和茂密的丛林里蜿蜒前进,巡逻任务非常艰难。
Mexico's southern border stretches for 960km (600 miles), snaking through remote highlands and thick jungle. Patrolling it is hard.
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