windows-phone-8 - WP8 语音被截断，即它只说句子的结尾

Question

我有一个应用程序，它将从 web 服务中检索一个值并宣布​​结果。然而，演讲似乎只会说最后几句话。我不认为这是由于网络服务造成的，因为即使我将它设置为说一个固定的句子，也会发生同样的问题。

例如，我可能会收到下面的演讲“在 XYZ 还剩很多”。

有任何想法吗？

    private async Task Speak(ObservableCollection<CarPark> rs)
    {
        if (rs.Count == 1)
        {
            await Speak(string.Format("There are {0} lots left at {1}", rs[0].lots.ToString(), rs[0].development.ToString()));
        }
    }
    ...
    public async Task Speak(string text)
    {
        SpeechSynthesizer tts = new SpeechSynthesizer();
        await tts.SpeakTextAsync(text);
    }

private async Task CollectCarPark(string Development)
 {
 ObservableCollection<CarPark> rs = new ObservableCollection<CarPark>();
 HttpClient httpClient = new HttpClient();
 rs = await httpClient.getCarParkSetResult(Development);
 await ShowCarParkRowset(rs, false);
 await Speech.Speak(rs);

}
------------------
public static async Task Speak(string text)
 {
 await Initialize();
 await synthesizer.SpeakTextAsync("Welcome to Get A Lot.");
 await synthesizer.SpeakTextAsync("Searching.. ");
 await synthesizer.SpeakTextAsync(text);
 }