ӣţţ  ţţͼ  ţţ  ţţƭ  ţţ淨  ţţ½  ţţע  ţţ淨  ţţ  ţţƭ  ţţô  ţţô  ţţͼ  ţţ  ţţ½  ţţ  ţţ  ţţ  ţţƭ  ţţ