ӣţţ  ţţ¼  ţţͼ  ţţô  ţţ淨  ţţͼ  ţţ½  ţţ½  ţţ  ţţ  ţţ  ţţô  ţţ  ţţ  ţţͼ  ţţͼ  ţţƻ  ţţ  ţţ  ţţô