坚持在地里劳动的英文表达可以是 "persevere in working the land" 或者 "stay committed to working the land"。这个表达强调了坚持不懈的努力，表示在地里工作是一项长期的任务，并且要持续努力才能获得成功。

来源：这个表达的来源可能源于农业生产的长期持续性，以及农民对于土地的承诺和对于农业生产的热爱。

例句：

Despite the challenges, he persevered in working the land and eventually turned his farm into a successful business.
She has stayed committed to working the land and preserving traditional farming methods for generations to come.
Many young people are leaving the countryside to pursue other opportunities, but a few still persevere in working the land and carrying on the family tradition.

中文翻译：

尽管有很多挑战，他还是坚持在地里劳动，最终把自己的农场变成了一家成功的企业。
她一直坚持在地里劳动，并为后代保留了传统的农业方法。
许多年轻人离开农村去追求其他机会，但仍有一些人坚持在地里劳动，并将家族传统延续下去。