N-COUNT 预言性事物；借以作出预测的事物 You can refer to something that helps you predict something that will happen in the future as a predictor of that thing. 预言性事物；借以作出预测的事物
Opinion polls are an unreliable predictor of election outcomes. [+ of]
民意测验并不能对选举结果进行可靠预测。
The child's reaction to the arrival of the new baby was a very good predictor of how they would get on during the year that followed.