He's a wily old fox.是什么意思？

He's a wily old fox.

他是个诡计多端的老狐狸。

wily

adj. 狡诈的，狡猾的，足智多谋的，诡计多端的；

例句
His appointment as prime minister owed much to the wily manoeuvring of the President.
他之所以被任命为总理，很大程度上是因为总统在阴谋操纵。

old

adj. 老的，古老的，以前的，（用于指称被替代的东西）原来的；n. 古时；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。

fox

n. 狐，狐狸，狡猾的人，狐皮；vt. 欺骗，迷惑，使困惑；vi. 耍花招；

例句
The image of the fox as a pest is grossly exaggerated in anecdote and folklore.
狐狸的害人精形象在传闻和民间故事中遭到严重的夸大。