The complex system could have discouraged people from voting.这一复杂的系统也许会使人们不愿意去投票。A complex system of muscles is brought into play for each body movement.每次的身体运动都需要复杂的肌肉系统活动。The previous administration had erected a complex system of trade barriers.上届政府已经建立了一整套复杂的贸易壁垒体系。