What is meant by "his water preceded" mentioned in the noble Hadith concerning the child's resemblance to his father or maternal uncles?

The meaning of "her water preceded it" is that the emission occurred first from the woman, based on the hadith of Umm Sulaym: "Yes, from where would the resemblance come? The man's water is thick and the woman's water is thin and yellow. Whichever of them prevails or precedes, from it will be the resemblance." And if the man's water precedes the woman's water, the child will resemble his paternal uncles. And if the woman's water precedes, the child will resemble his maternal uncles.