ӣţţ淨  ţţ  ţţͼ  ţţ  ţţ  ţţ  ţţͼ  ţţֱ  ţţ  ţţ  ţţ  ţţ淨  ţţ  ţţ  ţţע  ţţ淨  ţţ  ţţ  ţţ  ţţ½