1.upend 颠倒
Their results upend some of our basic assumptions.
研究结果颠覆了我们的一些基本假设 。
2.recession衰退
The economy is in deep recession.
经济正处于严重的衰退之中 。
3.hazard 大胆猜测
I would hazard a guess that they'll do fairly well in the next election.
我斗胆猜测,他们在下一轮竞选中会有不错的表现 。
4.markedly明显地
America's current economic downturn is markedly different from previous recessions.
美国目前的经济滑坡与以往的经济衰退明显不同 。