Researchers realised that a tunable laser beam might be useful in surgery.研究人员意识到，可调谐激光束也许可以用在外科手术中。Alexandrite laser is one of the superior tunable solid - lasers.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.The dielectric tunable behavio...
从那以后他们拆掉了简陋的棚屋。They have since knocked down the shack.他们只能住得起贫民区里最简陋的住处.They could only afford the meanest of rooms in a poor area.他们只有些简陋的工具.They only have rude tools....