He's been slogging away at that piece of music for weeks.

他苦练那段乐曲已有好几个星期了。

《牛津词典》

Don't just keep slogging away. Pay attention to method.

别一个劲儿傻干，要讲究方法。

《新英汉大辞典》

Keep slogging away! You're nearly broken the back of the problem.

顽强地坚持下去！这个问题最困难的部分你已经差不多解决了。

youdao