这种制度在学习不太好的学生中最失败。

The system is failing most disastrously among less academic children.

《柯林斯英汉双解大词典》

尽管他很聪明，但是学习不太好。

Clever as he is, he doesn't study well.

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怪不得最近他学习不太好了。

No wonder he is not doing well in his study recently.

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that it's okay to not do great in studio, but you can still succeed.

在工作室学习不太好不要紧，你依然能成功。

弗兰克盖里的母校 - SpeakingMax英语口语达人