But questions remain about how realistic the goal and timeframe are, given recent and steep Nasa budget cuts, and some scientists are concerned that the plans are driven by geopolitical goals.
Фото: Илья Питалев / РИА Новости
，这一点在爱思助手下载最新版本中也有详细论述
5.88 x 2.82 x 0.28 inches
improve workflow