Subject + 积累 + 了 + Object
The verb 积累 (jīlěi) means "to accumulate," "to amass," or "to build up" in Chinese. It describes a gradual process of gathering or collecting something over time, whether physical resources, experience, or abstract qualities like energy.
他用了十年时间积累了丰富的行业经验。
tā yòng le shí nián shíjiān jīlěi le fēngfù de hángyè jīngyàn.
He spent ten years accumulating rich industry experience.
学语言需要慢慢积累词汇,不能着急。
xué yǔyán xūyào mànman jīlěi cíhuì, bù néng zháojí.
Learning a language requires gradually accumulating vocabulary; you can't rush it.
这家公司积累了大量的用户数据。
zhè jiā gōngsī jīlěi le dàliàng de yònghù shùjù.
This company has accumulated a large amount of user data.