/956 Based on the above results,Theeuwes et al.(1998, 1999)suggested the parallel programming of two saccades:an exogenous saccade toward the onset distractor and an endogenous saccade to the target. They further suggested that the two saccade programs ran to completion in an undisturbed fashion(两个眼跳规划至结束，互不干扰). In other words,the programming of one saccade was not affected by the programming of another. The program that was completed first was executed frst.（谁先规划完，谁先开始执行眼跳) Based on the above results, Theeuwes et al. (1998, 1999) suggested the parallel programming of two saccades: an exogenous saccade toward the onset distractor and an endogenous saccade to the target.  They further suggested that the two saccade programs ran to completion in an undisturbed fashion（两个眼跳规划至结束，互不干扰）.  In other words, the programming of one saccade was not affected by the programming of another. The program that was completed first was executed first.（谁先规划完，谁先开始执行眼跳）