Most astronomers believe that large quantities of some unidentified material pervade the universe.
Most astronomers believe that large quantities of some unidentified material pervade the universe.
多数天文学家相信，宇宙充满了大量的不明物质。
Most astronomers believe that large quantities of some unidentified material pervade the universe.
多数天文学家相信，宇宙充满了大量的不明物质。