ΣУְרƣѧꡣ
1Ŀ꣺ רҵᶨ¡ǡ塢ȫ淢չһĿѧĻˮƽõְҵºʹʶĹǿľҵͿɳչձרҵ֪ʶͼܣҵҵԱշԱְҵȺܹ۹ʡղƷۡ鿱𡢶ֳȹĸʼ˲š
2Ҫγ̣ ýۡýӪӪƵֱ ӪýӪۡĻӪʵʵ⡢гԤ⡢ѡ άҵȡ
3 ҵ ҵ4 S ꡢҵĻҵݱ ˾ռ˾ֳ ҵάޱҵȵλ ۹ʡǰ̨ӴSA ƷרԱרԱרԱ ʦܡܡ ۾⾭4Sܾ˾4Sܼȸλְҵ
4飺 רҵעѧ ʶμȫְҵԺУܴ һ -ӪٻȽβμȫеҵܴȫ ְרԺУ´ҵѼȫһȽ1ΣȽ2Σ μȫóӪһȽȫҵְҵܾӪʡ һȽȽʡְҵԺУ ܴӪȽ