It is unadvisable to improve your academic performance at the expense of your health.更好一些
It is inadvisable that improveing achievement of lessons by impairing self's health.
以损害自己的身体健康来换取学习成绩的提高是不可取的。 It's not adoptable to harm one's health for improving academic performance.
It is unadvisable that ruins one's health for improving academic performance .
以损害自己的身体健康来换取学习成绩的提高是不可取的 Damage to their health in exchange for improved academic performance is not desirable
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