We keep the wall between us as we go.
to each the boulders that have fallen to each.
and some are loaves and some so nearly balls
we have to use a spell to make them balance:
"stay where you are until our backs are turned! "
we wear our fingers rough with handling them.
oh, just another kind of out-door game,
one on a side. it comes to little more:
there where it is we do not need the wall:
he is all pine and i am apple orchard.

what does the line “and some are loaves and some so nearly balls” refer to?

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."

she has clear pronunciation