保持 + (着) + Object/State
The verb 保持 (bǎochí) means "to maintain," "to keep," or "to preserve" a certain state or condition. It emphasizes the continuation of something over time. For example, 保持着人类的形态 means "maintaining a human form."
你要保持良好的睡眠习惯。
Nǐ yào bǎochí liánghǎo de shuìmián xíguàn.
You should maintain good sleeping habits.
他一直保持着每天跑步的习惯。
Tā yìzhí bǎochí zhe měitiān pǎobù de xíguàn.
He has always kept up the habit of running every day.
请保持安静,考试马上开始。
Qǐng bǎochí ānjìng, kǎoshì mǎshàng kāishǐ.
Please keep quiet; the exam is about to begin.