当树木长大枝叶茂盛时,它们可以起到隔声的作用.Trees also serve as sound Barriers when full grown and leafed out.实施减轻环境影响的措施,包括建造隔声屏障和广泛植树.Environmental impact abatement measures including noise barriers and extensive planting.本文介绍一种新型电动机隔声罩.Th...
托德气愤地摇了摇头，然后把那卷绳子往肩上一搭。Tod shook his head angrily and slung the coil of rope over his shoulder.迈克要求乔治和他交换位置，让他和托德同坐一辆车。Mike asked George to trade places with him so he could ride with Tod.托德的笑声里带了点歇斯底里的音调.A little note o...
Objective To observe the effect of full thickness lamellar keratoplasty combined with PTK ( photo therapeutic keratectomy ) .目的探讨联合 PTK 的全厚植片深板层角膜移植术的疗效.Objective To observe the application of viscoelastics in penetratin...
Helicopters with searchlights swept the park which was sealed off.直升飞机的探照灯来回扫射这个被封锁的公园。The Afghan air force was using helicopters to supply the besieged town.阿富汗空军正用直升机向被围城镇提供补给。The supplies need to be offloaded and put ...