ӣţţ  ţţ  ţţ  ţţô  ţţ淨  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ½  ţţע  ţţ  ţţƻƽ̨  ţţ  ţţ  ţţƻ  ţţ  ţţ  ţţֱ