talk the talk
说得头头是道，流利地谈论某事
释义：
to talk or act in a confident way so that you seem to be very good at what you do 流利(或令人信服)地谈论某事
类似，walk the walk 表示“说做就做，付诸行动”
例句：
She's only been a lawyer for three years, but she sure can talk the talk.
A team that talks the talk but cannot walk the walk.
