研究 + Object
研究 (yánjiū) is a verb meaning "to research" or "to study" a topic in depth. It can also function as a noun meaning "research." For example, 研究标准模型中的特性 means "to research the characteristics of the standard model."
他花了三年时间研究这个课题。
Tā huāle sān nián shíjiān yánjiū zhège kètí.
He spent three years researching this topic.
我们正在研究怎么解决这个技术难题。
Wǒmen zhèngzài yánjiū zěnme jiějué zhège jìshù nántí.
We are researching how to solve this technical problem.
她研究中国历史已经很多年了。
Tā yánjiū Zhōngguó lìshǐ yǐjīng hěn duō nián le.
She has been studying Chinese history for many years.