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The rehearsal studio is buzzing with lunchtime activity.
排练场被午餐时段活动搞得很热闹。
If the weather is wet or cold choose an indoor activity.
如果下雨或是天气寒冷，就选择室内活动。
He had been engaging in some kind of kinky sexual activity.
他一直在进行一些反常的性活动。