词汇	to maintain o.s
释义	to maintain o.s. 养活自己
随便看	conventional activated sludge conventional activated sludge process conventional activated sludge reactor conventional actived sludge conventional active sludge conventional adult conventional aeration Conventional aesthetics conventional agent conventional aggregate conventional agriculture conventional air attack conventional airfield attack missile conventional airfield defeat munitions conventional airfoil Conventional Air-Launched Cruise Missile conventional airplane conventional air-tube friction clutch conventional alkaline deinking conventional allowance conventional alphabet conventional ambition conventional ammunition Conventional Ammunition Logistic Support conventional ammunitions