没有任何证据证明广播行业的竞争曾经使成本降低。
There is no evidence whatever that competition in broadcasting has ever reduced costs.
静坐易于降低血压或使血压正常化。
一些研究表明,退休人员的社会保障体系使生育率降低了。
By some studies, the safety nets for retirees have reduced fertility rates.
We'v e shown that learning optimism prevents depression and anxiety in children and adults, roughly halving their incidence over the next 2 years.
研究证实,乐观可帮助儿童和成人,预防抑郁和焦虑,使未来两年的发病率降低一半。
So, these are an important list of factors as to the factors that can make somebody less likely to bring it up to the killing level.
这些都是很重要的影响因素,它们能使电击者,进行致命电击的可能性降低。
Oil, bonds, and stocks are all independent-- somewhat independent--they're not perfectly independent, but they're somewhat independent and, to the extent that they are, it lowers the variance.
石油,债券和股票都是互相独立-,一定程度上独立,不是绝对的独立,但一定程度上独立,可以使方差值变小,降低风险。
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