People are leaving an agrarian way of life to go to the city.人们正在放弃农业生活方式而转向城市.It concluded with approval of the emphasis on the agrarian movement.它的结论是赞成把重点放在土地运动上.His classical urbanity comes to his relief -- if one ca...
研究人员意识到，可调谐激光束也许可以用在外科手术中。Researchers realised that a tunable laser beam might be useful in surgery.紫翠宝石激光器是迄今为止较好的固体可调谐激光器之一.Alexandrite laser is one of the superior tunable solid - lasers.激发源为闪光灯泵可调谐若丹明染科激光器.The excita...