COLD CALL (noun or verb): a sales phone call from someone unknown to the recipient; to make a sales call to someone with whom you have had no previous contact. （冷不防打来的）推销电话;上门推销；冷访
- eg. We all hate to meet anyone who cold calls with an offer of financial advice. (verb)
- eg. She had worked as a call center operator making cold calls for time-share holidays.