    ι۲Ļʩ
    Ϊ˱֤ι۲ɹľȣ涨ʱһβ©Ľй۲⣬ڹ۲ӦȡһȶĹ̶Ļʩ
    (1) ι۲ݵĻ׼㡢ͱ۲ϵıι۲㣬λҪȶ׼Ǳι۲Ļݣȹ̿ɿĻ׼㣬ÿ긴һΣι۲Ӧڱ۲ܷӳұڹ۲λá
(2) ι۲豸Ҫ̶۲ԱҪ̶۲ͬ۲·ߡλͷҪ̶

