Technology trends may push Silicon Valley back to the future.

技术的发展趋势有可能把硅谷重新推向未来。

But suppose the earth could be covered with sensors spaced one foot apart,

假设地球上可以布满传感器，每个相隔1英尺，

In 1928 some porpoises were photographer working like beavers to push ashore a waterlogged mattress.

1928年，有人拍摄到了海豚像海狸一样把浸透水的床垫推上岸的情景。

As a shipbuilder, Cockerell was trying to find a solution to the problem of the wave resistance which wastes a good deal of a surface ship's power and limits its speed.

作为一个船舶技帅，科克雷尔在寻找解决波浪阻力的方法，因为波浪阻力浪费掉了船在水面行驶的大量动力，从而限制了船的速度。

Parents are often upset when their children praise the homes of their friends and regard it as a slur on their own cooking, or cleaning, or furniture,

当家长听到孩子赞扬自己朋友的家时，总感到不安，认为这是孩子在嫌弃自家的饭菜、卫生、或家具，

below 20 per cent, its bactericidal action is negligible.

浓度低于20％时，杀菌能力基本上就不存在了。