百度 这些粒子对我们地球的轨道无足轻重,因为地球质量极大,贝努的质量只有吉萨大金字塔的13倍左右。
Einar Tangen is a senior fellow at Taihe Institute. In this video, he reflects on the 75-year journey of the People's Republic of China since its founding and explores the reasons behind its remarkable achievements.