cold call

ˌcold ˈcall verb [transitiveT]

to telephone or visit someone you have never met before and try to sell them something 给…打电话推销商品；上门推销

—cold call noun [countableC]

—cold-calling noun [uncountableU]

From Longman Business Dictionary

cold callˌcold ˈcall (also blind call)MARKETING

if someone who is selling something makes a cold call or a blind call, they telephone someone they have never spoken to before to offer them a product or service

I’ve started to get cold calls from phone dealerships offering me free upgrades for my phone.

Placing blind calls isn’t entirely futile, insists Mr. Sobeck, who guesses that one out of 40 or 50 calls turns up a lead.

—cold calling noun [uncountableU]

Cold calling is an effective sales tactic if it’s done properly.

—cold caller noun [countableC]

A cold-caller mistakenly called the company’s boss.

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