ӣţţ  ţţƻ  ţţ  ţţ  ţţƻ  ţţô  ţţ  ţţͼ  ţţ½  ţţ  ţţ  ţţ  ţţ  ţţ½  ţţƭ  ţţ  ţţ  ţţע  ţţͼ  ţţ