名词
1. At that time people believed the earth was the center of the universe. 当时人们相信地球是宇宙的中心。
2. Our world is but a small part of the universe. 我们的世界只是宇宙的一小部分。
3. That is the most wicked place in the universe. 那是世界上最最邪恶的地方。