91． But if robots are to reach the next stage of laborsaving utility, 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.

　　[参考译文]但是如果机器人要达到节省人工的下一个阶段，它们将必须在更少的人力监督之下工作，而且还要能够自己作出至少几个决定--这些目标才会引发真正的挑战。

　　92．But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of a winding forest road or the single suspicious face in a big crowd.

　　[参考译文]但是人类的头脑可以只迅速地瞟一眼一个快速改变的场面，然后立刻放弃98%的不相关部分，而马上聚焦于一条崎岖森林道路边的一只猴子，或者在茫茫人海中的一张可疑的脸。

　　93． The OECD estimates in its latest Economic Outlook that, if oil prices averaged $22 a barrel for a full year, compared with $13 in 1998, this would increase the oil import bill in rich economies by only 0.25---0.5% of GDP.

　　[参考译文]OECD在其最近的《经济瞭望》中估计，如果石油价格与1998年的每桶13美元相比在一年中平均为每22美元，这也只会给富裕的经济体的石油进口账单上增加GDP的0.25%到0.5%。