ӣţţ淨  ţţô  ţţ  ţţô  ţţ  ţţ  ţţͼ  ţţƭ  ţţ  ţţ  ţţ  ţţֱ  ţţ½  ţţ  ţţ  ţţ½  ţţƻ  ţţ  ţţ  ţţ