Years of dislike boiled over and blows were exchanged.多年的厌恶之情终于爆发，双方拳脚相加。He exchanged pleasantries about his hotel and the weather.他就宾馆和天气寒暄了几句。The two sides exchanged fire with artillery, mortars and small arms.双方交火时动用了...
风吹得枯叶在四处回转.The wind whirled the dead leaves about.它可以用于回转式机器,也可以在水下应用.It can be used on rotating machinery and under water.回转频率也可以通过浅显的论证导出来.The cyclotron frequency can also be derived by an elementary argument....