常見例句雙語例句Two of the questions are "At what location between the Earth and Moon does the net gravitational force on a spaceship become zero as it travels between the two bodies?"其中的兩個問題是:太空船在地球和月球之間航行時,処於什麼位置的時候太空船所受到的淨引力爲零?blog.sina.com.cn 返回 net gravitational force