Cold call: an unexpected telephone call or visit by sb trying to sell sth.
向潜在的主顾打的冷不防电话
cold boot:乍冷,骤寒 短语
(打给潜在主顾推销商品的)冷不防电话 短语cold snap | 乍冷,骤寒 短语cold boot | 蓄意而残忍地 cold fish