有用
练习多了对数字的反应时间明显缩短。
Listen Number is not free (it costs 2.90), however it doesn't contain in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
The price of Listen Number is 2.90.
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练习多了对数字的反应时间明显缩短。
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