伯克希尔过去几年的业绩显示出，虽然其业绩随经济而有所起伏，但比起整体市场还是更为稳定。
Berkshire's results in the past few years demonstrate that while returns have bobbed and weaved with the economy, they have been more stable than the broader market.
正如19世纪晚期美国经济开始腾飞之时那样，新兴经济国家的经济状况不甚稳定，容易出现动荡起伏。
Just like America during its take-off in the late 19th century, emerging economies tend to be subject to economic ups and downs.
这些跌宕起伏的变化迫使我们的祖先学会及时适应变化;大脑发达的人类可能是在一个不稳定的环境中幸存下来。
These ups and downs might have forced our ancestors to adapt quickly; big-brained humans may have had a survival edge in an unstable environment.
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