IBM Speech to Text-i2 入门教程: https://cloud.ibm.com/docs/services/speech-to-text?topic=speech-to-text-gettingStarted#getting-started-tutorial API 参考: https://cloud.ibm.com/apidocs/speech-to-text APIkey:cEGe9ay254ij1TC_mKKPAF3w1Xzxvet1iuaX1qqpSYT0 URL: https://api.us-south.speech-to-text.watson.cloud.ibm.com/instances/ef0da16b-8c34-46e4-a5c8-260a9079c1fc ...