The whole gas which is colliding with the oscillator cools off.與振動(dòng)子碰撞的整個(gè)氣體將逐漸冷卻.The molecules bounce off each other like two colliding billiard balls.當(dāng)分子相互彈開時(shí)就象兩個(gè)碰撞的彈球.After colliding, both cars turned turtle.碰撞后, 兩部車都翻個(gè)...