ACTEn.自动检查试验装置(自动测试装置)actn.行为；行动；法案；(戏剧、歌剧等的)一幕；假装v.行动；举止；假装；表演；扮演；充当；有效果act up to ones opinionadj.实行其主张(照自己的主张行事)actvited sludge system活性污泥法act as an intermediary充当介绍人act to execute a crime实行着手act of distintegration蜕变动作Activating TIG welding活性化焊剂act as host or hostess尽主人之谊act as sb's instrumentactivation of activity活性激发act on one's own study