英汉词典 专业、权威的英语单词查询平台

activity activity - based costing activity accident activity account activity accounting activity address code activity against radar coverage activity allocation activity allocation model activity analysis activity analysis problem activity approach activity area activity attributes activity balance line evaluation activity based depreciation activity breakthrough activity buffer activity build-up activity center activity chain address activity charge activity chart activity classification activity code activity coefficient activity coefficient of nitrogen activity coefficient of seawater activity concentration activity constant activity content activity control form activity correction factor activity cost activity costing activity counter activity curriculum activity curve activity cycle activity date/time activity decay activity definition activity definition statement activity description activity diagram activity diaries survey activity discard activity discharge activity discharge at the stack activity discharge to the environment activity distribution activity duration activity duration compression activity end activity energy activity escape activity execution activity factor activity factor of B (in a liquid or a solid mixtu activity factor of solute B activity file activity focus activity for defocus activity form list activity grid activity groupings activity holiday activity holidays activity in market activity in material production activity in production activity in the market activity in the model activity index activity indicator Activity Indicators activity inhibitor activity interrupt activity inventory activity investment activity job activity leader activity learning activity level activity level vector Activity light activity limit activity line activity list activity list slot activity loading activity log activity logging activity longitude activity management activity map activity measurement activity measuring instrument activity measuring point activity meter activity monitor activity monitoring activity name activity network activity of (vulcanization) accelerator activity of a foyer of atmospherics activity of cathode activity of cement activity of clay activity of h ion activity of mineral activity of process activity of radionuclides activity of subcortical system activity on arrow activity on arrow (aoa) activity on edge network activity on node (aon) activity on vertex network activity on-node activity patterns activity plan activity plan editor activity plan monitor activity product activity program status word activity programme activity queue activity quota activity quotient activity radius activity range activity rate activity ratio activity ratio method activity ration activity ratios activity record activity related basis of allocation activity relating to civil law activity relation chart activity relationship chart activity relationship diagram activity relationship diagram actual budget activity report subsystem activity report system activity research activity restart activity restart cycle activity resume activity retention capability activity rhythm activity room activity routine activity sampling activity save area activity scale activity scanning activity school activity sequence activity series activity set activity source activity space activity sphere activity standard activity start activity state activity store activity surveillance of reactor coolant activity teaching activity termination activity test activity theory activity therapy activity time activity to assist the impoverished students activity trace activity tracker activity trail activity transient activity transport activity trap activity traps activity type activity unit activity units activity variable activity variance activity vector activity volume activity working space activity's activity(chemical) activity(radiation) activity-based activity-based physical education curriculum activity-based simulation activity-baseds activity-centered activity-coefficient activity-dependent activity-dependent reinforcement mechanism activity-directed simulation activity-event network activity-gradient activity-identifier activity-mass formula activity-node net work activity-on-arrow network activity-on-node network activity-oriented activity-oriented language activity-range activity-ratio method activity-related activity-relationship chart activity-sensing equipment activity-specific activity-time data activity-tracker activityconstant