"If we go into a protectionist downward spiral, we are lost,".

VOA: standard.2009.04.15

You can see that if a was equal to g, your downward acceleration is that of gravity, namely the cable has snapped in the elevator, Then you don't feel any weight.

你会发现如果 a 等于 g,你下降的加速度就是重力加速度,也就是电梯的绳索断了,那时你会完全失重

耶鲁公开课 - 基础物理课程节选

Then the--so the term structure was downward-sloping until about two and a half years and then it was upward sloping.

期限结构线先向下倾斜,在到期期限过了两年半的时点后,才缓慢回升

耶鲁公开课 - 金融市场课程节选

But the threat of terrorism, according to former Yemeni prime minister Abdul Karim al-Iryani, is equally part of the downward economic spiral causing anger on the streets of Sana'a.

VOA: standard.2010.04.20

And very often what that does-- a positive emotion can take us out of this downward spiral and create an upward spiral.

很经常的是-,积极情绪把我们带出下行螺旋,形成一个上行螺旋。

哈佛公开课 - 幸福课课程节选

Ann Veneman,is anExecutive Director of UNICEF, She says global efforts have stopped a downward trend in vaccinations and have even boosted the number of children and infants being vaccinated.

VOA: standard.2009.12.28

And what we know is that very often we enter a downward spiral, a vicious cycle when we go into this narrow and constrict mode.

我们知道经常会进入下行螺旋，一个恶性循环，当我们进入狭窄收紧的模式。

哈佛公开课 - 幸福课课程节选

We had an extraordinarily high price-to-earnings ratio representing a lot of optimism in the '20s for the stock market and then it corrected and went abruptly downward-- that was The Great Depression.

在二十年代,市盈率高得离奇,表现了当时人们对股票市场的乐观,当其得到修正并突然下跌时,大萧条便开始了

耶鲁公开课 - 金融市场课程节选

That's a strongly downward-sloping term structure.

这是个显著向下倾斜的期限结构

耶鲁公开课 - 金融市场课程节选

Now, there's also a trend downward.

目前也有降低的趋势

耶鲁公开课 - 金融市场课程节选

Irving Fisher also drew on the curve a production possibility frontier for society, which he made downward-curved.

欧文·费雪还画了一条曲线,代表了社会的生产可能性边界PPF,这是一条向下的曲线

耶鲁公开课 - 金融市场课程节选