en_tn_condensed/mrk/13/20.md

Unless the Lord had shortened the days

"If the Lord had not decided that he would shorten those days"

had shortened the days

"had reduced the days of suffering" or "had shortened the time of suffering"

no flesh would be saved

"no one would be saved" or "everyone would die"

for the sake of the elect

"in order to help the the elect, those whom he chose"