ӣţţ  ţţֱ  ţţע  ţţ  ţţ淨  ţţͼ  ţţ  ţţ¼  ţţ½  ţţ  ţţ淨  ţţ淨  ţţƽ̨  ţţ½  ţţ  ţţ¼  ţţ  ţţ  ţţ½  ţţֱ