The board realized too late that the new consultant was a mountebank selling empty promises.

董事會太晚才發現，那位新顧問是個只會開空頭支票的騙子。

Customers complained that the online seller was a mountebank who never shipped their orders.

顧客抱怨那個網路賣家是個騙子，從來沒有寄出他們的訂單。

Before hiring, check references carefully so you do not end up employing a smooth-talking mountebank.

聘用前務必仔細查核推薦人，以免雇用到一個能言善道的騙子。