What are the meanings of these two sentences?
Acrophonic principle: is another way to extend logograms according to the sounds of their words, according to which character was extended to mean not the sound of a whole syllable but just one of its important sounds, usually the first consonant.

What does it mean? Can give any example?

Boustrophedon( "ox-turning"- that is, turning like oxen in plowing) every other line of writing is filliped or reveresed. Alternate lines in boustrophedon must be read in opposite directions.

Does it mean . One line is stright and the next is oposite? Also "oxen in plowing" refer to what?

Question

What are the meanings of these two sentences?
Acrophonic principle: is another way to extend logograms according to the sounds of their words, according to which character was extended to mean not the sound of a whole syllable but just one of its important sounds, usually the first consonant.

What does it mean? Can give any example?

Boustrophedon( "ox-turning"- that is, turning like oxen in plowing) every other line of writing is filliped or reveresed. Alternate lines in boustrophedon must be read in opposite directions.

Does it mean . One line is stright and the next is oposite?  Also "oxen in plowing" refer to what?

Answer

Hi @Amirreza, you can find some examples of Boustrophedon writing here: https://en.wikipedia.org/wiki/Boustrophedon
Oxen is the plural of Ox - an animal which can be harnessed to a plough for farming.
Plowing is the American spelling of ploughing (pronounced the same "plowing"), which means to turn up the earth (for farming)
So oxen in ploughing refers to farming, where the oxen work in one direction, then turn and work back the other way in a parallel line, similar to how text is written in Boustrophedon.