Can't learn an old dog new tricks, as the saying is.

俗话说得好,老狗学不会新把戏.

英汉文学 - 汤姆历险

On important occasion, however, he knew, as the saying is, how to make his authority felt.

可是在紧要关头他知道怎样, 象俗话所说的, 放出他的威风.

辞典例句