Question

想要保持健康我们不仅要有合理的饮食还要有足够的锻炼。

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Answer

In order to keep healthy, we need not only right diets but also enough exercise./We need not only right diets but also enough exercise to keep healthy.

【解析】

想要（为了）保持健康in order to keep healthy；我们we，主格代词；不仅……还not only…but also；合理的饮食right diets；足够的锻炼enough exercise。本句需用不定式表目的，根据句意结构，可知填：In order to keep healthy, we need not only right diets but also enough exercise./We need not only right diets but also enough exercise to keep healthy.