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1. Oxford Dictionary

   activity

   • IPA[akˈtɪvɪti]

   英式

   • n.
     the condition in which things are happening or being done；busy or vigorous action or movement

   • noun: activity, plural noun: activities

2. • 釋義

   n.

   名詞

   • 1. the condition in which things are happening or being done there has been a sustained level of activity in the economy the only sign of human activity now is the boatload of day trippers from the mainland
   • ▪ busy or vigorous action or movement the room was a hive of activity 同義詞 bustle, hustle and bustle, busyness, action, liveliness, ... 更多movement, life, stir, animation, commotion, flurry, tumult, hubbub, excitement, agitation, fuss, whirl, happenings, occurrences, proceedings, events, incidents, informaltoing and froing, comings and goings, to-do, archaichurry-scurry, pother反義詞 calm
   • 2. a thing that a person or group does or has done the firm's marketing activities 同義詞 pursuit, occupation, venture, undertaking, enterprise, ... 更多project, scheme, business, job, affair, task, campaign, interest, hobby, pastime, recreation, diversion, entertainment, act, action, deed, doing, exploit, manoeuvre, informalthing, lark, caper
   • ▪ a recreational pursuit or pastime a range of sporting activities 同義詞 pursuit, occupation, venture, undertaking, enterprise, ... 更多project, scheme, business, job, affair, task, campaign, interest, hobby, pastime, recreation, diversion, entertainment, act, action, deed, doing, exploit, manoeuvre, informalthing, lark, caper
   • 3. a thermodynamic quantity representing the effective concentration of a particular component in a solution or other system, equal to its concentration multiplied by an activity coefficient.