Attention must be paid on the synergic relationship between these two events.有必要注意這兩個(gè)事件的協(xié)同關(guān)系。Attention must be paid on the synergic effect of smoking and silicosis in cancer complication.吸煙和矽肺同時(shí)存在時(shí),有必要注意協(xié)同作用.The synergic...