The Fed then again cut interest rates in 2001 in response to the very definite weakness of the economy.
美联储在2001年又一次降低了利率1,为了适应经济中明确的弱点。
And what this is is technically described as a decline in the tendency to respond to stimuli that are familiar due to repeated exposure.
它在学术上被描述为,由于重复暴露在刺激环境中,而造成对该刺激反应倾向的降低。
One of the hypotheses that was being tested in this particular study was that a low-fat diet would reduce a woman's risk for breast cancer.
其中一个,在研究中被检验的假设是,低脂膳食,有助于降低妇女患乳腺癌的风险
We know in an adiabatic expansion the system's going to cool.
我们知道在绝热膨胀过程中,系统温度会降低。
Banks are in trouble and as you know - they're starting to fail because they the value of their assets in the market is falling rapidly.
银行陷入危机,并且你知道,他们开始破产因为他们,市场中资产的价值,在迅速的降低。
Then the first time so he came up a major third there and then quickly backed off with just a half step below it, which completely gave it a different feel.
于是开始的时候,乐曲中出现一个大三和弦,然后快速地降低了半个音,这种变化给人完全不同的感受
It dropped dramatically in the period from 1954-- this is these filled black bars refer to this axis, polio cases per 100,000 population dropped down to only three or four cases by 1956.
患病率在一九五四年后的,一段时间里急剧下降,该坐标轴上的这些黑色柱形图表明,到一九五六年,小儿麻痹症的发病率,已经降低至每十万人中仅三到四人发病
I mean, if the energy is lower to occupy a smaller volume, then if I have this room and a bunch of molecules of oxygen, and nitrogen and what have you in the air, and there are weak attractions between them, why don't they all just sort of glum together and find whatever volume they like.
我的意思是,如果占据小的体积会使能量降低,如果我有这样一个空间,和一些氧气,氮气和其他空气中有的气体,并且分子之间还有微弱的相互作用,为什么他们不黏在一起,然后占据他们所想要占据的体积。
So, the optimal thing to do if you live in a world like this n is to get n as large possible and you can reduce the standard deviation of the portfolio very much and there's no cost in terms of expected return.
如果现实中也这样简单的话,那么你就尽量增大,这样就能让投资组合的标准差,就会大大降低,从预期收益率的角度来看,这样做的成本是零。
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