You must change nothing in your writing without absolute necessity. If it is necessary， then change with simplicity.

Sometimes it's better to take a step back and focus on your mental health.

欧盟最大的问题在于它不是一个国家，却假装成一个国家。

物资用完了才知道不足，是因为不懂得计量；事情做完了才知道有余，是因为不懂得调节。