两到三分钟的英文演讲稿
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发布时间：2024-10-04 07:54
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时间：2024-10-06 21:38
Our own planet,Earth,is becoming more and more crowded and polluted.Hopefully,we can start again and build a better world on Mars.First of all,transport should be much better.In a very short time,space shuttles will travel at half speed of light.Humans meed food,water and air to survive.Scientists hope to plants that can grow on Mars.These plants will produce the food and oxygen that we need.However,it is not certain if these plants will be able to produce water .The gravity on Mars is only about three-eights of the gravity on Earth.Humans on Mars would have to wear special boots to make themselves heavir.
