在距离地球表面393千米的太空中有什么呢?星光还是月色?抑或是永恒不变的寂静?其实,“天宫二号”空间实验室就在这个高度的近地轨道上马不停蹄地运行着。它在这里可不是欣赏太空风景的,而是为了进行各种科学实(试)验,更肩负着验证中国空间站建造重要技术的神圣使命。但是,终年不休地工作,“天宫二号”也是会“饿”的。这时,就轮到“天舟一号”出场了,有很 In the distance of 393 kilometers from the Earth's surface in space what is the starlight or the moonlight or the eternal silence? In fact, “Tiangong 2 ” space laboratory on this high altitude orbit non-stop Running. It is here not to appreciate the landscape of space, but to carry out a variety of scientific real (test) test, but also bear the sacred mission to verify the important technologies of China's space station construction. However, throughout the year to work endlessly, “Temple 2 ” will also “hungry ”. At this time, it is the turn “day boat on the 1st ” appeared, there is