OSCAOffice of Senior Citizens Affairs 中等城市事务办公室； abbr.；=Office of Senior Citizens Affairs 老年人事务局OSabbr.操作系统=（Operating System）oscillating damper减振器oscillograph trace示波图,波形图,示波图扫迹osmotolerant yeast耐高渗压酵母oscillating packer振动式装袋机os infrastapediale蹬下骨osmotic regulators渗透调节物质oscillomutric inde示波指数os angulospleniale隅夹板骨os epipterygoideum上翼骨osmotic separation渗透分离