For non-native English speakers: American pronunciation practice with voice recognition and replies. See, hear, say and check a selection of very useful social communications such as greetings, questions, requests and farewells.
对于非以英语为母语：美国发音练习与语音识别和应答。看，听，说和检查非常有用的社会交往，如问候语，问题，要求和告别的选择。

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