n. 1.活动；活跃；动作；活动力；能动性。 2.活性；放射性。 3.机能，功能。 4.〔美国〕机构。 5.〔pl.〕 活动范围。 短语和例子 conscious activity 主观能动性。 recreational activities 文娱活动。 be in activity (火山等)在活动中。 with activity 精神充沛的。
any specific behavior; "they avoided all recreational activity"
the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age" 同义词：activeness,
an organic process that takes place in the body; "respiratory activity" 同义词：bodily process, body process, bodily function,
a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" 同义词：natural process, natural action, action,
the state of being active; "his sphere of activity"; "he is out of action" 同义词：action, activeness,
(chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity"
例句与用法
1.
All this activity did bring its reward . 这一切活动确实不是徒劳的。
2.
This illegal activity was once commonplace . 这种非法活动曾一度流行。
3.
Love is the only reasonable activity of man . 爱是人唯一有理性的行为。
4.
Patterns of activity differ between species . 同种的活动形式不同。
5.
There had been little activity on the street . 街道上没什么动静。
6.
He partook in the activities of the school . 他参加了学校的活动。
7.
Some review of its activities is required . 我们需要对其活动进行一些叙述。
8.
The business is a cover for unlawful activity . 以经商为幌子从事非法活动。
9.
Do n't restrict her proper activities . 不要拘束她的正当活动。
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