论文部分内容阅读
人类制造的第一个月亮,将在1990年发射上天。这颗人造月亮比真月亮还要亮10倍,到那时,人们在月光下看书、写字都没有问题了!人造月亮是美国宇航局设计的,总重量有450吨。
The first moon made by mankind will be launched to heaven in 1990. The man-made moon is ten times brighter than a real moon, and by that time people read and write in the moonlight without any problem! The artificial moon was designed by NASA and has a total weight of 450 tons.