在电话语音识别中需要识别电话号码，这需要识别0到9十个数字，而识别前首先需要训练这十个数字，要求数字组数最少。 -In a telephone speech recognition need to identify phone numbers, which need to identify 10 numbers 0 to 9, while the former first need to identify the training for 10 numbers, the least numb