黄樱桃番“懒惰”的硬币准备：一个玻璃杯，一张卡片，一枚硬币。操作：把卡片放在玻璃杯上，再把硬币放在卡片中间，你能不碰硬币，就使硬币直接掉进玻璃杯里吗？沿水平方向稍用力弹一下卡片就能做到。结论：这是因为硬币有惯性的缘故，在它没受到外力时，仍要保持原来状态， Yellow cherry Fan “lazy” coin preparation: a glass, a card, a coin. Action: Place the card on the glass and place the coin in the middle of the card. Can you drop the coin directly into the glass without touching the coin? Use a little bit of force in the horizontal direction to do the card. Conclusion: This is because the coin has inertia, and when it is not subjected to external forces, it still needs to maintain its original state.