Take part in this activity
活动───activity;参加───participate in
Business is a competitive activity. It is very fierce and very unforgiving.───商场如战场，竞争激烈，不近人情。
For thousands of years chasing down game was the main activity in which humans were involved.───狩猎是数千年中人类从事的主要活动。
The days that preceded were filled with activity.───前几天排满了活动.
There is no reason why you should not continue with any sport or activity you already enjoy.───没有理由停下你一直在进行的体育运动或活动。
The construction site was a hive of activity.───建筑工地上一片繁忙景象.
There may be a price to pay for such relentless activity, perhaps ill health or even divorce.───这样没命地工作可能要付出代价，也许是健康受损，甚至是离婚。
We must expose this shameful activity to the newspapers.───我们一定要向报社揭露这一无耻行径.
This sort of activity damages the reputation of the collective.───这种行为有损于集体的荣誉.
He watched the house for signs of activity.
Muscles contract and relax during physical activity.
The threat of war has depressed business activity.
Activity is the only road to knowledge.
The whole place was a scene of feverish activity.