“打工”的英语翻译有多种表达方式，具体取决于上下文和使用场景。以下是一些常见的翻译：

to work for others

to do manual work

to work part-time

to hire out for work

to work as a migrant worker

to engage in paid employment

to sell one's labor

根据这些翻译，你可以根据具体情境选择合适的表达。例如，在描述临时性工作时，可以使用“to work part-time”或“to hire out for work”；在描述外来务工人员时，可以使用“to work as a migrant worker”或“migrant workers”。