What does it mean to kill the same root in a fleeting time?

This is what the eight-character prediction says, twelve branches; Zi, Ugly, Yin, Mao, Chen and Si. . . . . . . . . You, Xu and Hai have hidden heavenly stems. If there are hidden heavenly stems in the earthly branches in that year, and the hidden heavenly stems in the measured eight-character earthly branches collide or collide with each other, it is a fleeting time to kill the roots. As for the result of killing the root, it is necessary to infer whether it is good or bad by combining the whole eight characters. Generally speaking, if Tonggen Tiangan is used for pleasure, the fate of the Lord is easy to be unfavorable. If we avoid the heavenly stems from the same root, there will be nothing or the fate of the Lord will be fine. If the roots are dry and idle, there is nothing, that is, there is no good thing, no bad thing, normal. I hope it helps you.