亦

In a sentence

• 他志向远大，亦深思熟虑。

  He is ambitious and also thinks deeply.

  Here, '亦' means 'also', showing that the subject has an additional quality of thinking deeply aside from being ambitious.

• 书中亦提到了这个重要的历史事件。

  The book also mentions this important historical event.

  In this context, '亦' is used in a written or formal tone to mean 'also' or 'too' in emphasizing that something additional is mentioned in the book.

• 生活中，快乐亦是重要的一部分。

  In life, happiness is also an important part.

  Here, '亦' is used in a somewhat literary sense to indicate an addition, aligning with the idea of happiness being part of an important aspect of life.