So, you have to feed the slave all year round to work only a small part of the time, that's not very profitable.

你不得不整年的喂养奴隶,而他们只有少量时间在工作,这是很不划算的

耶鲁公开课 - 古希腊历史简介课程节选

You can't have slaves without wealth, because you got to feed them at the very least, and no matter how wicked a master you are, dead slaves are no good to you.

养奴隶没钱是不行的,因为不管你有多恶劣,也得供给他们生存的食物,死人是毫无用处的

耶鲁公开课 - 古希腊历史简介课程节选