text to speech api 响应异常

Question

文字转语音返回异常
一个例子如下：

其中reason 字段显示：SynthesizingAudioCompleted
但是audio_length为0， audio_duration为0 

{"result_id":"083adeb4bc64408680394d5fe29298c3","reason":"SynthesizingAudioCompleted","audio_length":"0","audio_duration":"0","audio_data":"","properties":{},"impl":{"value":"139957417685520"}}

这个信息是服务返回没有经过处理的，还请麻烦帮忙确认。