The bonds are auctioned off on regular dates and you cannot participate in the auction; I assume you can't.

这些债券在规定期限内拍卖,你们不能参与这些拍卖,我想你们是不行的

耶鲁公开课 - 金融市场课程节选

The second assumption we're going to make which is new is that we're going to assume that candidates cannot choose their position.

我们给出的第二个假设,这个新的假设是,候选人不能选择他们的位置

耶鲁公开课 - 博弈论课程节选