There was an old dog in the middle of the street who seemed lost.

街中央有只老狗，它好像迷路了。

youdao

One afternoon, an old dog ran into Ben's yard.

一天下午，一只年迈的狗跑进本的院子里。

youdao

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

俗话说得好，老狗学不了新把戏。

youdao

He's not to be allowed to fall into his grave like an old dog.

VOA: special.2009.11.29

Yet,some people say that you can never teach an old dog new tricks.

VOA: special.2010.05.30

Stump is ten years old the oldest dog ever to win the championship at Westminster.

VOA: special.2009.02.23

Michelson, the old dog, provided wisdom that complemented the energy of the young pup Bradley.

FORBES: 4 Leadership Lessons From The 2012 Ryder Cup

Young animals grow up and Chamber's not old, but you can, we can, teach that old dog new tricks.

FORBES: Business Out Front

And you get RBDS station and track info, which is a nice new trick to teach an old dog.

ENGADGET: Zune review