We will have developed traffic. People will work and study at home. The robots will be used everywhere. People who get serious disease can be treated now .With the development of the world economy people will live better and better . But environment problems become more serious . Some people think the earth is not suitable for people to live in .We should look for another planet to live in .1交通便利.2人們可以在家里工作和學習.3機器人將會廣泛應用于各個領域.4很多目前無法治愈的疾病得到了解決.5隨著世界經(jīng)濟的發(fā)展,人們的生活水平越來越好,但是環(huán)境問題日益嚴重,有的人認為地球?qū)⒉贿m合人類居住 .人們得另外找一個適合人類居住的星球才行.