来篇居住在火星上的想象文【英文】80词左右

来篇居住在火星上的想象文【英文】80词左右
来篇居住在火星上的想象文【英文】80词左右

来篇居住在火星上的想象文【英文】80词左右
Mars is not as close to Earth as Venus is,but it probably is the only planet in our solar system that we can colonize.But living there won’t be simple.
Mars is poorly suited for human habitation.There’s some ice at thepoles and perhaps some water in underground repositories.Gravity isonly 38 percent as strong as on Earth.The atmosphere is thin andconsists mostly of carbon dioxide (95%).So colonists would have toeither take air from Earth or make air on Mars.Plants efficientlyseparate the oxygen bound to carbon and therefore can make air we canbreathe,so colonists should take plants along.
The Martian atmosphere is too thin to hold oxygen,which would just escape to space.So the plants would have to be cultivated in greenhouses and the oxygen they produce kept in flasks.
Mars has a very weak magnetic field,and its atmosphere offers littleprotection against radiation from space.So the Martian colonists wouldhave to build radiation protection into their houses and wear thicksuits.Unlike Earth,where most incoming meteorites burn up in theatmosphere,many meteorites crash dangerously onto the surface of Mars.
The Martian weather is awful.It’s cold:the average temperature of thesouthern hemisphere is minus 60 degrees Celsius; even at the equator,it’s seldom over zero.Winds are fierce and blow at speeds of severalhundred kilometres an hour,and storms can last for months.The windwhirls up fine dust that penetrates everything and sticks to allsurfaces,which literally would toss sand in the gears of vitalmechanical and electronic equipment.
Today,there are no concrete,approved plans for sending people to Mars.The earliest date mentioned in official papers is 2019,which would be 50 years after the first Moon landing.