一个名叫欧提勒士的学生想向普罗塔哥拉学习论辩术,便找上了门。“你可以跟我学习论辩术,但我不能白教,要收费。”普罗塔哥拉对欧提勒士说,“你的学费可以分两期支付,一半学费在入学时支付,另一半学费可以在你学成以后,即第一次出庭胜诉后再交付。你认为如何?”欧提勒士同意了,两人随即签订合同。 A student named Otico wanted to study Protocols in Protagoras and found the door. “You can learn the argument with me, but I can not do it for a fee,” said Protagora on Otelios. “Your tuition can be paid in two installments, with half of the tuition paid on admission, The other half of tuition fees can be after you learn, that is, after the first appearance of a court case before the delivery of what do you think? ”Ou Tellers agreed, the two immediately signed a contract.