???????2????,???????2?????淨(jìng),???????2?????????
???????2?????ū????淨(jìng)????????????????淨(jìng)??????????????????????????????б?????????ū??????С?????????????
???????2?????ū
????????????????ж?Ρ??????????????????“ж??”????????λ??
???????????“????”????????(?????????????)??????λ?????λ????????????????ó????????λ??????????1?Σ?????????????????????????
??????????????????3?????????????????????λ?????????????????????????λ?????????δ???
????????λ(????????????λ????????????????????????λ?????)?????嶠→???幬?嶠→????????????????????→???????????????????????????????????С?