spaceguard

spaceguard

 英

  • 网络太空卫士;太空警卫;太空防护

例句

Today NASA astronomers are carrying out a survey called the Spaceguard Survey to find any large near-Earth asteroids long before they hit.

今天美国航天局天文学家正在开展调查称之为太空卫士调查’,以期及早发现任何大型靠近地球流星