ӣţţ  ţţƭ  ţţ  ţţ  ţţ  ţţ淨  ţţ  ţţ½  ţţ  ţţƻƽ̨  ţţ  ţţ  ţţô  ţţ  ţţ½  ţţ  ţţֱ  ţţͼ  ţţ½  ţţ¼