说明：  用户也可以点击“停止录音”，以停止声卡，结束录音。 StreamBuff中所有的剩余语音都会被送入TBNR，并通知TBNR录音完毕。 TBNR收到足够的语音后开始识别，并通过EventCallback和ResultCallback两个回调 函数通知TbnrSdiDemo当前识别状态以及识别结果。
(users can click on "stop recording" to stop sound card and the end of recording. StreamBuff all the remaining voice will be sent to TBNR and notified TBNR finished recording. TBNR received adequate recognition after the speech, and through EventCallback and two callback function ResultCallback notice T bnrSdiDemo current state of identification and recognition results.)