ӣţţ  ţţ½  ţţ  ţţ  ţţ  ţţ  ţţ  ţţƻ  ţţ  ţţ¼  ţţ  ţţ  ţţ  ţţ  ţţ  ţţô  ţţ  ţţ  ţţͼ  ţţֱ