1. About such matters it is useless to speculate, what we need is exact knowledge. 对这样的事情作猜测是无用的,我们要的是确切的了解。
2. "Oh, no, " said the boy slowly. " That water would be useless: it 's HOT water! “哦,不行”,这个男孩慢慢地说,“那些水不能用啊,因为那些水是热的!”
3. The three most useless things to a pilot are the altitude above you, runway behind you and a tenth of a second ago. 对于飞行员来说,最没用的三件事:在你上面的高度、在你背后的跑道,以及刚过去的十分之一秒。
英英解释
adj.
1. having no beneficial use or incapable of functioning usefully