He had what they called "Livery servants", not just servants, but servants who were wearing livery, it look like a military uniform.

他拥有一群被叫做"制服仆人"的仆人,这些人并不仅仅是仆人,而是穿着制服的仆人,他们的衣服就像军人穿的军装一样

耶鲁公开课 - 金融市场课程节选

kind of a uniform here. It's like the New York uniform, "Must wear black."

就好像是这里的制服，好像是纽约的制服，“你必须要穿黑色”。

上东区的氛围 - SpeakingMax英语口语达人