Neither do the dealers determine the term structure; the dealers have to buy and sell at prices that are in the market.

中间商也不能决定,中间商只能按照市场价进行交易

耶鲁公开课 - 金融市场课程节选

It's not for us to alienate them or to give them up, to give them away, to trade them away, to sell them.

就是我们不能远离，放弃，丢弃，交易，或出售自然权利。

耶鲁公开课 - 公正课程节选

Later on when times are more secure, there's trade for grain as well for everything else, but when you're settling a place in the first place, you can't rely on somebody bringing it to you.

在之后相对安定的年代,有了粮食及其他各种物品交易,但当你刚开始在某地定居时,并不能指望有人为你供给必需品

耶鲁公开课 - 古希腊历史简介课程节选