辛勤 + 地 + Verb
辛勤 (xīnqín) is an adjective meaning "industrious," "diligent," or "hardworking." It emphasizes sustained, dedicated effort over time and is commonly used with 地 to form an adverbial phrase modifying a verb, as in 辛勤地工作 (to work diligently).
老师们辛勤地培养了一代又一代的学生。
Lǎoshīmen xīnqín de péiyǎng le yī dài yòu yī dài de xuéshēng.
Teachers have diligently nurtured generation after generation of students.
蜜蜂在花丛中辛勤地采蜜。
Mìfēng zài huācóng zhōng xīnqín de cǎi mì.
Bees diligently collect nectar among the flowers.
他辛勤工作了三十年,终于退休了。
Tā xīnqín gōngzuò le sānshí nián, zhōngyú tuìxiū le.
He worked diligently for thirty years and finally retired.