7. A method of providing a two-way interaction mechanism to a user for obtaining a textual phrase, comprising steps of: playing an audio content to the user, wherein the audio content includes a plurality of audio phrases and audio key phrases, wherein the plurality of audio key phrases are highlighted by one selected from a group consisting of a play speed, a tone, a sound volume and a combination thereof; allowing the user to select one from the plurality of audio key phrases by receiving a speech input including the user-selected audio key phrase based on the audio contents being output; a buffer temporarily storing a number of outputted audio key phrases within a desired period and the speech input, wherein the desired period is a prior period of time before a moment when the speech input is received by the input module; performing a speech recognition by matching the number of outputted audio key phrases during the desired period with the speech input, so as to obtain the user-selected audio key phrase; and converting the user-selected audio key phrase into a textual phrase.
7. A method of providing a two-way interaction mechanism to a user for obtaining a textual phrase, comprising steps of: playing an audio content to the user, wherein the audio content includes a plurality of audio phrases and audio key phrases, wherein the plurality of audio key phrases are highlighted by one selected from a group consisting of a play speed, a tone, a sound volume and a combination thereof; allowing the user to select one from the plurality of audio key phrases by receiving a speech input including the user-selected audio key phrase based on the audio contents being output; a buffer temporarily storing a number of outputted audio key phrases within a desired period and the speech input, wherein the desired period is a prior period of time before a moment when the speech input is received by the input module; performing a speech recognition by matching the number of outputted audio key phrases during the desired period with the speech input, so as to obtain the user-selected audio key phrase; and converting the user-selected audio key phrase into a textual phrase. 8. The method according to claim 7 , wherein the speech recognition is one of a direct acoustic wave recognition and an acoustic model recognition.