。
She says her life is monotonous.
Literal
She [topic-は] life [subject-が] monotonous is [quotative-という].
~という at sentence end means 'says that' — a report of her own statement. 単調 (たんちょう) means 'monotonous' or 'uneventful,' and 生活 (せいかつ) means 'daily life/lifestyle.' The が after 生活 follows the XがY pattern where the described quality (monotonous) applies to the subject (her life).