ӣţţ  ţţ  ţţ  ţţ  ţţͼ  ţţ½  ţţ½  ţţ½  ţţֱ  ţţ¼  ţţע  ţţô  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţͼ  ţţ