雷打不动

tā měi tiān zǎo shang jiān chí pǎo bù léi dǎ bù dòng

他每天早上坚持跑步，雷打不动。

He persists in jogging every morning, an exercise not to be stopped for him under any circumstances.

wǒ de zǔ fù měi tiān dōu huì chī yī pán lěng huǒ tuǐ léi dǎ bù dòng

我的祖父每天都会吃一盘冷火腿，雷打不动。

Every day without variation my grandfather ate a plate of cold ham.