佢點樣令E個世界更美好?
如果冇左牛頓E個世界有咩唔同?
更新1:
佢點用萬有引力黎解釋地球唔會跌?? 我唔要COPY AND PASTE
更新2:
how gravity explain the motioof the planets?
更新3:
上個個錯 how gravity explain the motion the planets?