So he has been working on trying to find other tools of monetary policy.

所以，他一直在寻求找到,货币政策的其他工具。

耶鲁公开课 - 金融市场课程节选

I think we're still in a precarious situation but I think we do have central bankers who are working effectively given the tools that they have.

我认为我们仍处于一个不稳固的情形之中,但是我们也有那些,用手中的金融工具有效率地工作的,中央银行主。

耶鲁公开课 - 金融市场课程节选