unsustainable a．不能成立的，不能支持的
Anyone can see this trend is unsustainable (a.)．Yet few seem willing to try to reverse it．[2003年阅读]
[译文]任何人都明白这个趋势不能维持下去，但是很少有人愿意扭转它。
upend v．颠倒，倒放
Some economists argue that powerful structural changes in the world have upended (v.) the old economic models that were based upon the historical link between growth and inflation．[1997年阅读]
[译文]一些经济学家认为，世界经济结构强有力的变化已经推翻了那个以经济增长和通货膨胀的历史上相互关联为基础的旧的经济模式。
upscale a．高消费的
Replies show that compared with other Americans，journalists are more likely to live in upscale (a.) neighborhoods，have maids，own Mercedeses，and trade stocks，and they’re less likely to go to church，do volunteer work，or put down roots in a community．[2001年阅读]
[译文]结果表明，与其他美国人相比，新闻记者更有可能居住在富人区，有女佣、有奔驰车、炒股，而他们去教堂、参加志愿服务、扎根社区的可能性却很小。
utility n．①功用，效用 vt．(有效)利用，使用[生] n．②公用事业
But if robots are to reach the next stage of laborsaving utility(n.)，they will have to operate with less human supervision and be able to make at least a few decisions for themselves??goals that pose a real challenge．[2002年阅读]
[译文]但是如果机器人要进一步实现劳动力节省，他们必须能够在更大程度上减少人的监控，并且至少能够独立地做一些决定，这些是具有真正挑战性的目标。