1.(not useful)无用的；无价值的
This map is just useless.这张地图一点用处也没有。
Their money was useless in this country.他们的货币在这个国家一文不值。
Computers would be useless without software writers.没有编程员, 计算机就会毫无价值。
2.(pointless)无益的；无效的；不能收到效果的
3.<非正式>(very bad)差劲的；无能的
You're useless!你真差劲！
4.to feel useless
(feel unable to help someone)感觉自己一无是处