?ac·tiv·ityBrE/ækˈtɪvəti/NAmE/ækˈtɪvəti/noun(ac·tiv·ities)?[uncountable]a situation in which sth is happening or a lot of things are being done活动；热闹状况；活跃economic activity经济活动The streets were noisy and full of activity.街上熙熙攘攘，车水马龙。Muscles contract and relax during physical activity.身体活动时肌肉收缩放松。 ➡ compareinactivityatinactive?[countable, usually plural]a thing that you do for interest or pleasure, or in order to achieve a particular aim（为兴趣、娱乐或达到一定目的而进行的）活动leisure/outdoor/classroom activities休闲／户外／课堂活动The club provides a wide variety of activities including tennis, swimming and squash.这家俱乐部的活动丰富多彩，诸如网球、游泳、壁球等。illegal/criminal activities不法／犯罪活动
