activity

n.活动，行动

act, act as, act for, act on, act out, acting, actinism, action, action group, action painting, action replay, action stations, actionable, activate, activation, active, active service (US also active duty), actively, activeness, activist, actor, actress, actual, actuality, actually, actuarial, actuary, actuate, acuity, acumen, acupuncture, acupuncturist, acute, acute angle, acute mark, acutely, acuteness, AD, ad hoc, ad infinitum,