"咱们谈谈吧"的英文翻译是"Let's talk"或"Let's have a talk."。

"Let's"是"let us"的缩略形式,表示"让我们"的意思。"Talk"是动词,意思是"谈话"或"交谈"。

因此,"Let's talk"或"Let's have a talk"的意思是"让我们谈谈"或"让我们来谈谈吧"。

下面是一些英文例句,以及它们的中文翻译:

"Let's talk about it over dinner." (让我们在晚餐时谈谈这件事。)
"Let's have a talk with the manager." (让我们和经理谈谈。)
"I think we should sit down and have a talk about this." (我认为我们应该坐下来谈谈这件事。)