He's not frightened of getting his hands dirty.

他不怕体力劳动。

《牛津词典》

We ask him, Are your hands dirty?

我们问他，你的手脏吗？

youdao

The theory is now with you. Go get your hands dirty.

现在你已经掌握这些理论了，放手干吧。

youdao

As much as I might talk on stage twice a week it turns out that it's really by doing and really by diving in and getting your hands dirty that you really take away the course's lessons.

我一周上两次课,就算说得再多，也不如你们亲自动手,通过真正的深入研究,才能学到知识。

哈佛公开课 - 计算机科学课程节选

you can take clinics if you want to get your hands dirty and start practicing law,

如果你想要入行，开始做律师，你可以去法律实务班，

哈佛法学院的课程 - SpeakingMax英语口语达人

So with the problems, that is where you really will get your hands dirty and truly immerse yourself in this world of computer science and programming.

带着这些问题，你就能深入研究,这真的可以使你沉浸到计算机科学,和编程世界中。

哈佛公开课 - 计算机科学课程节选

Swedes love a statesman, but they want a prime minister who gets his hands dirty.

ECONOMIST: Sweden

"These fellas really get in and get their hands dirty, " Miller says of the course.

CNN: Teen techies graduate with enhanced learning

Unlike Rikyu, though, Koetsu got his hands dirty, shaping the clay, carving it with knife and spatula.

CNN: ASIANOW - TIME Asia | The Subtle Magic of Koetsu