在 + Place + 耕耘
耕耘 (gēngyún) is a verb meaning "to cultivate," "to plow and weed," referring to the physical labor of farming. It is also frequently used figuratively to describe dedicated, sustained effort in any field, such as 在学术领域耕耘 (to cultivate in the academic field).
农民们在田里辛苦地耕耘了一整天。
Nóngmínmen zài tián lǐ xīnkǔ de gēngyún le yì zhěng tiān.
The farmers worked hard in the fields all day long.
她在音乐领域耕耘了二十多年。
Tā zài yīnyuè lǐngyù gēngyún le èrshí duō nián.
She has been working in the field of music for over twenty years.
只有认真耕耘,才能有好的收获。
Zhǐyǒu rènzhēn gēngyún, cái néng yǒu hǎo de shōuhuò.
Only through diligent work can one reap a good harvest.