Moment of inertia: turning around its axis of symmetry, object has the character keeping speed and the direction of the axis of rotation not changing.

　
英 美
  • 轉動(dòng)慣性:物體在繞著(zhù)自己的對稱(chēng)軸轉動(dòng)時(shí),具有保持轉速和轉動(dòng)軸方向不變的性質(zhì)。
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