[=passive optical surveillance system]被动光学监视系统
[=percutaneous on-surface stimulation]经皮表面刺激
[=proximal over-shoulder strap]近(心)端过肩固定

[=possibility]可能性,概率
[=possible]可能的,可能存在的,合理的

< poss. >
possible; possibly; possession; possessive 的缩写