They still hold gold and right now the Federal Reserve System has about eleven billion dollars of gold.

他们仍然持有金子,并且现在，联邦储备系统拥有价值,一百一十亿美元的金子。

耶鲁公开课 - 金融市场课程节选

Or you get a cold, the cold virus takes hold, the viruses start replicating inside of you and it takes some time for immune system to gear up to eliminate it, so we're used to thinking about responses that take some time.

或者你得了感冒,感冒病毒扎根在你的身体中,病毒开始在你体内复制,免疫系统需要一定时间做好准备去消灭它,所以我们曾认为免疫反应需要一定时间

耶鲁公开课 - 生物医学工程探索课程节选