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