There means in that place. "Your shoes are over there beside the door."
On the other hand their means belonging to them. "Tell Mary and Bob that their shoes are over there by the door."
put upon "Three wise men came bearing gifts." = carrying"Her bearing was as a ballet dancer." = deportment"He took his bearing from his pocket compass." = direction"The wheels contained twelve ball...
'Mean' in this context means 'average'. Thus, 'mean word length' means 'average word length'. This is the total number of letters in your piece of writing, divided by the total number of words.Here...