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dart - Flutter 文本转语音 : Speak several strings subsequently with different SpeechRates

我对FlutterTextToSpeech包有疑问。单击FloatingActionButton时,我想随后说/播放几个字符串(具有不同的Speechrates)。但是,这样做时,我只能听到传递给函数的最后一个字符串,而不是第一个。正如您在下面的代码中看到的,我尝试使用异步编程(async/await)。import'package:flutter/material.dart';import'dart:async';import'package:flutter_tts/flutter_tts.dart';classSpeakerClassextendsStatefulWidget{@o