英语的基本翻译：
It is important/crucial for middle school students to form a good learning habit.
这里是基本的It作为形式主语的表达方式，也可以参考用分词形式或者不定式充当主语的翻译。
如： To form a good learning habit is important for students in middle school.
Being able to form a good learning habit is important for students in middle school.
It is very important for middle school students to form a good learning habit.
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