??????? ?????? ????????? ??????????? ?? ??????????? ȸ???? ????, ??ȣ, ???????, ?ӿ?????, ?繫?? ???? ????, ?? ?ۿ? ????ɷ????? ???ϴ? ?????? ?????ϵ??? ?Ǿ? ????.
?׷??? ?????ڵ??? ?????? ???ڸ? ???ؼ??? ????? ?Һ???, ?ŷ?ó, ?ٷ???, ??????ȸ ????? ???迡???? ???? ?ؼ? ???? ?? ??ȸ?? å?? ??????Ȳ?? ???? ???繫?? ??Ҹ? ?????ϰ? ?Ͽ? ?????ڵ??? ?˱Ǹ??? ?????ϰ?, ?ش????? ??ġ ?? ???Ӱ??ɼ??? ????? ???? ?? ?ְ? ?ؾ? ??.
???? ????? ???? ?Һ??ڡ??ٷ??ڡ??ŷ?ó????????ȸ ?? ???? ?????ڵ??? ?䱸?? ?????? ?????????ν? ??ȸ?? ?????? ?????? ??ġ?? å?? ?ִ? Ȱ???? ?????????? ?????? ?Ѵٴ? ?????? ?????뿡 ?????ؾ??? ?ʿ䰡 ?ְ? ?̸? ?????ϱ? ???? ?????? ?޹?ħ ???? ?ʿ???.
?̹? ????, ??????, ????, ????ũ, ???ư? ?? ???? ?????? ????  ????ȸ?????, ???Ű?????????(NRE)?? ???? ???? ?繫???? ?̿ܿ? ȯ??, ?ٷ?ȯ??, ?????Ļ?, ?ϵ??޾?ü?? ?߿伺, ????????ü???? ????Ȱ?? ???? ???繫?? ?????? ???? ???ø? ????ȭ?? ?????ڵ??? ?ո????? ?Ǵ??? ???? ???ذ????ڵ鿡?? ?????? ?????? ?????? ?? ?ִ? ?????? ??ġ?? ?????ϰ? ????.
?̿? ???? ?繫???? ?߽??? ????????? ??????????? ????????? ??????׿? ?ٷ?????, ?????? ?? ???Ȱ?????κ??? ?߻??ϴ? ȯ??????? ?????ϱ? ???? ?濵Ȱ??, ??????ȸ ????Ȱ?? ? ???? ???? ?? ????? ??ȸ?? å?? ?????¿? ???? ?????? ?߰??Ͽ? ?????ڵ??? ?ո????? ?Ǵ??? ????, ????? ?ڹ??????? ??ȸ?? å?? ???????? ?????ϴ? ????? ??ȸ?????⸦ ?????ϰ??? ?ϴ? ????(?? ??159????2??).