activity /ækˈtɪvɪti/ n. 活动；热闹状况；活跃:

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例句/词组:

The streets were noisy and full of activity.

街上熙熙攘攘,车水马龙。

英语解释：

a situation in which sth is happening or a lot of things are being done 活动；热闹状况；活跃: