After several nuclear disasters, a controversy has raged over the safety of nuclear energy. 几场核灾难过后，一场核能安全的争论到达了白热化。
Earth now understands that the Sirian scientists were creating an alternative planet to escape to in the event of a nuclear cataclysm in the Sirian solar system. 地球现在明白，天狼星科学家在天狼星太阳系的核灾难事件中制造了一个代用行星来逃逸。
