activity的音标是 [ækˈtɪvəti]。

activity 是一个名词，意思是活动；行动；活跃。它指有目的的行为、事件或过程，或指状态的活跃。

以下是10个带有中文翻译的例句：

1 The main activity of the club is hiking。 该俱乐部的主要活动是徒步旅行。

2 There was a sudden flurry of activity in the market。 市场上突然出现了一阵忙乱。

3 The office was a hive of activity。 办公室一片繁忙景象。

4 The house was full of activity all day。 房子里一整天都很热闹。

5 The police are monitoring the criminal's activity。 警方正在监视该罪犯的活动。

6 Economic activity has slowed down recently。 最近经济活动放缓了。

7 The volcano showed signs of activity。 这座火山显示出活动迹象。

8 Classroom activity is often reflected in the school newspaper。 校报经常反映课堂活动。

9 What is your favorite leisure activity？ 你最喜欢的休闲活动是什么？

10 The website tracks user activity。 该网站追踪用户活动。

短语搭配：

outdoor activity 户外活动

economic activity 经济活动

enzymatic activity 酶活性

criminal activity 犯罪活动

volcanic activity 火山活动

classroom activity 课堂活动

leisure activity 休闲活动

physical activity 体育活动

business activity 商业活动

human activity 人类活动