致力 + 于 + Verb/Noun
致力 (zhìlì) means 'to devote oneself to' or 'to commit to' a task or cause. It conveys a sense of serious, sustained effort and is typically used in formal writing. It is almost always followed by the preposition 于 (yú) before the object of effort.
他多年来一直致力于环境保护事业。
Tā duō nián lái yīzhí zhìlì yú huánjìng bǎohù shìyè.
He has been dedicated to the cause of environmental protection for many years.
这家公司致力于开发更高效的新能源技术。
Zhè jiā gōngsī zhìlì yú kāifā gèng gāoxiào de xīn néngyuán jìshù.
This company is dedicated to developing more efficient new energy technologies.
她致力于推动乡村教育的发展。
Tā zhìlì yú tuīdòng xiāngcūn jiàoyù de fāzhǎn.
She is dedicated to promoting the development of rural education.