1·It was a period of intense activity.
那是活动激烈的时期。
—— 《牛津词典》
2·Economic activity often follows a cyclical pattern.
经济活动常常遵循周期性模式。
—— 《牛津词典》
3·Does such an activity constitute a criminal offence?
难道这样的活动也算刑事犯罪吗?
—— 《牛津词典》
4·The test records the electrical activity of the brain.
这个测试显示出大脑的电流活动。
—— 《柯林斯英汉双解大词典》
5·The rehearsal studio is buzzing with lunchtime activity.
排练场被午餐时段活动搞得很热闹。
—— 《柯林斯英汉双解大词典》