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想升级成无限版，尝试多次，显示订单无法处理，不知该如何解决？
我碰到了和他相同的问题，不知道怎么解决。
@xiaowen0437 您好，谢谢您的反应。已私讯您，再麻烦您看看了。
Lingvistプレミアムプラン料金改定のお知らせ
Course change failed
Possible synonyms and wrong audio track (Spanish, French)
Free exercises to learn English
無料プラン内容改定のお知らせ
無料トライアル期間について
Will the Portuguese course ever return?
