还挺有趣的
本来是给儿子练习用的,没想到自己也完了起来刷到20000分了。
口算训练 is not free (it costs 0.99), however it doesn't contain in-app purchases or subscriptions.
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The price of 口算训练 is 0.99.
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本来是给儿子练习用的,没想到自己也完了起来刷到20000分了。