explaining the Proverb does any body can explain me the meanning of these Proverbs. 1.He is wet behind the ears. 2.Jump the gun. 3.Keep one's ear to the ground.

what is differences between accents helllo every body i want to know what is differences between english accents all over the world.i heared there are many accents in U.S and also other english language countries.and also which accent is common in the world.