An activity is something that you spend time doing.
近义词
pursuit , action , exercise
双语例句
例： For lovers of the great outdoors, activities range from canoeing to bird watching.
户外活动爱好者可以参加从划船到观鸟的各种活动。
例： leisure activities such as watching television.
像看电视这种休闲活动。
例： ideas for classroom activities.
课堂活动的想法。