The 240-kilogram robot was sent into the sky to survey Mars' landforms, geography situation, and something about water, ice, environment and other physical fields.
A geographical information system containing details of household water use and sanitation in the villages was built using data obtained by a global positioning system survey.
采用全球定位系统调查获得的数据，建立一个地理信息系统，包含村庄中家庭用水和卫生用水的详细情况。
3
If we took a quick survey in Africa - How many people would choose a 1 millions shirts over malaria drugs or accessible clean water?