他们设置有限目标以及确定期限。

They set limited objectives and firm deadlines.

youdao

不能确定期限的，应当确定解密的条件。

Where it is impossible to determine the secrecy period, the conditions for declassification shall be determined.

youdao

I have stocks, bonds, and oil but I want also to add one more final asset, we'll call it the riskless asset, long-term bonds are somewhat uncertain and variable because they're long-term.

有股票，债券和石油,我还想再增加最后一种资产，我们称之为无风险资产，由于长期债券持有期限很长,存在一定不确定性及风险。

耶鲁公开课 - 金融市场课程节选