If someone makes a cold call, they telephone or visit someone they have never contacted, without making an appointment, in order to try and sell something.

如果某人给你打了个“冷电话”（cold call），就是说他在与你素未联络、且并未预约的情况下贸然致电或拜访，试图销售自己的商品。

我们常说的“骚扰电话、推销电话”就可以用cold call来表示。其名词形式为cold calling。

例如：

She had worked as a call center operator making cold calls to sell life insurance.

她在一家呼叫中心做电话员的工作，专门打推销电话卖人寿保险。