ӣţţ  ţţƻƽ̨  ţţ淨  ţţֱ  ţţ½  ţţ  ţţ  ţţ½  ţţ  ţţͼ  ţţ¼  ţţע  ţţ½  ţţ  ţţ  ţţƭ  ţţ  ţţ  ţţֱ  ţţ