ӣţţ  ţţô  ţţ淨  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ½  ţţ  ţţ  ţţ¼  ţţͼ  ţţƽ̨  ţţ