解释：不可以不知道活着的乐趣，也不可以不知道虚度光阴的担忧。

Singing is not only my career, but also my passion.

语言不仅是交流的工具，更是一种存在方式。

The jaws of power are always open to devour, and her arm is always stretched out, if possible, to destroy the freedom of thinking, speaking, and writing.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.