【正确答案】:
AN APPROACH TO POLYSEMY, WHICH STUDIES THE COEXISTENCE OF VARIOUS MEANINGS OF THE SAME WORD IN A CERTAIN HISTORICAL PERIOD OF TIME. 
【题目解析】:共时角度是一种多义关系的研究方法,它研究同一个词在某一历史时期的各种意义的共存。
AN APPROACH TO POLYSEMY, WHICH STUDIES THE COEXISTENCE OF VARIOUS MEANINGS OF THE SAME WORD IN A CERTAIN HISTORICAL PERIOD OF TIME.