管理员摘要：
He refused to believe his son was involved in drugs. 他不愿相信他的儿子沾染毒品。 How many vehicles were involved in the crash? 这次撞车事故涉及多少辆汽车？ Three teams are involved in the chase for the championship. 有三支队伍参加冠军的……
He refused to believe his son was involved in drugs.
他不愿相信他的儿子沾染毒品。
How many vehicles were involved in the crash?
这次撞车事故涉及多少辆汽车？
Three teams are involved in the chase for the championship.
有三支队伍参加冠军的.角逐。
She's involved in many extra-curricular activities.
她参加了许多课外活动。
After retiring, she became involved in voluntary service in the local community.
她在退休后投身于当地社区的志愿服务工作。