词汇	回声控制设备
释义	回声控制设备 echo control device
随便看	participation management mechanism participation matters participation mechanism participation method participation model participation-model didactics participation motivation participation m procedure participation network participation news participation of citizen participation of citizenes participation type participation type of leisure activities Participation was voluntary participation of communities participation of community people participation of cultures participation of employees participation of exercise participation of interests participation of its citizens in political life participation of lawyer Participation of man in nature participation of neighboring group