Translation of bullock in Spanish

I was wondering if you can tell me if few words how to study here because I don't know that's why I'm not on line most of the time,thanks. Can you help me explaining me how to do the lessons, I still don't understand it
The first thing he wanted to show us was a war memorial for Cambodia's civil war. The war has ended only few years earlier and was still very present in the mind of the entire population.
We caught the last bus leaving from Calama to San Pedro the Atacama in the Atacama desert, the driest place on earth. Even NASA is using this place as a live moon simulation area. It was night though.