to work hard on something for a long period
长时间在某事上努力工作 (cháng shíjiān zài mǒu shì shàng nǔlì gōngzuò)
"She grinded away at her studies to pass the exam."
"她努力工作，努力学习，最终通过了考试。" (tā nǔlì gōngzuò, nǔlì xuéxí, zuìzhōng tōngguòle kǎoshì)
to stay focused on your goal despite difficulties
to sell very quickly and in large quantities
staying loyal and supportive for a long time
to stop working for a short time to rest
to be noticeably different or better than others
In the planning or design stage
