摘要： You would see mountains and valleys if you looked at the Moon through a telescope. 如果你通过望远镜观察月球，你会看到山脉和山谷。 If you looked at the planet Jupiter, you wo 阅读全文

摘要： Recently, remarkable progress has been made in China's manned lunar exploration mission. 最近，中国载人登月探索任务取得了显著进展。 The names of the manned lunar landing s 阅读全文