The molecules bounce off each other like two colliding billiard balls.当分子相互弹开时就象两个碰撞的弹球.A billiard - table must be perfectly even.台球桌必须十分平.The billiard ball travelled gently across the table.台球慢慢地滚过台面....
We tugged so hard that the rope broke.我们使劲地拉以至把绳子拉断了。David tugged again and the muzzle slipped from Faber's grasp.大卫猛地一拉,枪口终于从费伯的手中滑脱了.A wry smile tugged at the corner of his mouth.他的嘴角带一丝苦笑.The sight of the poor ch...