Can any Christians explain to me what these bible verses mean?

JUDE1:5-10Though you already know all this,I want to remind you that the Lord delivered his people out of Egypt,but later destroyed those who did not believe.And the angels who did not keep their positions of authority but abandoned their own home-these he has kept in darkness,bound with everlasting chains for judgment on the great Day.In a similar way, Sodom and Gomorrah and the surrounding towns gave themselves up to ual immorality and perversion.They serve as an example of those who suffer the punishment of eternal fire.In the very same way,these dreamers pollute their own bodies,reject authority and slander celestial beings.But even the archangel Michael,when he was disputing with the devil about the body of Moses,did not dare to bring a slanderous accusation against him,but said,"The Lord rebuke you!"Yet these men speak abusively against whatever they do not understand;and what things they do understand by instinct,like unreasoning animals-these are the things that destroy them