板振动对微穿孔板吸声体的 声学 特性存在一定的影响.The panel resonance always affects the absorption characteristics of microperforated - panel ( MPP ) absorber.试验表明,微穿孔板吸声结构可有效地降低排气噪声.Results show that the acoustic system of micro perforation p...
Methods : Utilize the naprapathy to cure palm joint parenchyma trauma.方法 利用推拿揉捏等方法治疗掌指关节损伤200例.Atkinson has been told rest is the only cure for his ankle injury.阿特金森被告知休息是唯一能治好他脚踝伤的办法。Antibiotics is effective to cure t...
我们在蜘蛛网似的偏僻街道中七拐八拐地穿行。We threaded through a network of back streets.积有灰尘的角落挂着厚厚的蜘蛛网。Thick cobwebs hung in the dusty corners.蜘蛛网的几何形状the geometry of a spider's web...
奥斯卡喝了伏特加后醉醺醺地跳起了脱衣舞。Oscar, much the worse for vodka, did a striptease.塔格特思忖着是否再要一杯双份伏特加。Taggart debated whether to have yet another double vodka.他挂账买了两瓶伏特加酒。He bought two bottles of vodka on account....