The thermos, with the lid on top, It's not a open system your coffee is going to stay warm or hot in the thermos.

顶部盖了盖子的热水瓶，不是开系,你希望你的咖啡在热水瓶里面保持温暖,或滚烫。

麻省理工公开课 - 热力学与动力学课程节选

Well, they're similar to banks and they have a relationship with the investment community and they try to stay on top of everything that's happening.

他们与银行相似,而且他们与投资圈有着关系密切,他们努力对任何事件保持掌控

耶鲁公开课 - 金融市场课程节选