Until the teens, telephones were very expensive because they didn't have good amplification technology.

在20年代之前,电话还是奢侈品,因为它们还没有增强讯号技术

耶鲁公开课 - 金融市场课程节选

They didn't have telephones; they used to have runners.

过去没有电话,只有跑腿的

耶鲁公开课 - 金融市场课程节选

The reason they call them boiler rooms is, if you are selling stocks by telephone there's no reason to rent a nice office, so you get the cheapest -so you put a whole bank of telephones in the cheapest place.

它之所以被叫做锅炉房是因为,如果通过电话进行买卖交易,你没有必要去租一间漂亮的办公室,于是你租了最便宜的出租房,然后在那儿放满电话

耶鲁公开课 - 金融市场课程节选