You can't teach an old dog new tricks. (an old dog will learn no new tricks.)

谚老狗学不了新把戏；老年人很难适应新事物。

youdao

You can't teach an old dog new tricks. (an old dog will learn no new tricks.)

谚老狗学不了新把戏；老年人很难适应新事物。

youdao