英 [ˈjuːsləs] 美 [ˈjuːsləs]
adj. 无用的，无价值的；差劲的，无能的；无效的，徒劳的；（身体一部分或心智因有病或受到损害而）丧失功能的
useless /ˈjuːslɪs/ CET4 TEM4
形容词 If something is useless, you cannot use it. (指某物) 不能用的
He realized that their money was useless in this country.
他意识到他们的货币在这个国家不能用。
形容词 If something is useless, it does not achieve anything helpful or good. 没用的; 不起作用的
She knew it was useless to protest.
她知道抗议是没用的。
形容词 If you say that someone or something is useless, you mean that they are no good at all. (人或物) 不行的
Their education system is useless.
他们的教育制度一点儿也不好。
形容词 If someone feels useless, they feel bad because they are unable to help someone or achieve anything. (某人感到) 没用的
She sits at home all day, watching TV and feeling useless.
她整天坐在家里，看电视、感到自己没用。
having no beneficial use or incapable of functioning usefully
a kitchen full of useless gadgets ; she is useless in an emergency
书生无用(Useless)：【坛子里的故事】天阔的文学之路 书生无用：清风旧事琐忆
...当刚把前一次事情解决,好不容易(Finally)过了几天安定的生活,忽然间又冒一个来,我自己心里是有数,但没钱还,说什么也没用(Useless),这样下去真的不是个办法,就算这样磨啊磨的,一次一次家人把我欠的钱还清了,但也会对我彻底死心了,手机不敢关,就怕别人以为我跑路...
泰勒，这位在火箭板凳上做了很久的人，可能也将具有用武之地(Useless)，他能否以己方的浮现克服锻练的相信？好马不吃回头草，因为回头的时候已经没有草了。
此时说再多，解释再多都无济于事(Useless)，我会勇敢地面对这一现实，并全力以赴备战下赛季的比赛。下赛季我会一定会卷土重来，争取重返职业排名赛。
usage 使用；用法；惯例
use 使用；用途；发挥
using 使用；利用
user 用户；使用者
usefulness 有用；有效性；有益
usability 合用，可用；可用性
usableness 可用；使用方便
uselessness 无用，无效
use 使用，运用
use 利用；耗费
无用的；无效的
She knew it was useless to protest.
她知道抗议是没用的。
This pen is useless.
这支笔没用了。
He's useless—he'll have to go.
他毫无用处—得辞掉他。
And,in one language in Botswana, there are three main kinds of plants and animals: edible "eat-things", harmful "bite-things" and "useless things."
VOA : special.2009.12.02
All of Milton's labors in the cause of liberating England from the tyranny of monarchy had in some way - could be construed as having been useless.
弥尔顿为把英国从君主暴政解放出来,所做的努力在某种程度上,可以说是付之东流了。
弥尔顿课程节选 : 耶鲁公开课
If you just scramble a sentence, it's pretty useless because the recipients are never going to be able to reverse the process.
如果你只是加密一个句子，这是毫无用处的,因为收件人没法将这个句子,反加密出来。
计算机科学课程节选 : 哈佛公开课
But Mr. Mindon was proud to be rich enough to have a perfectly useless room in his house.
VOA : special.2009.01.31
But Mister Mindon was proud to be rich enough to have a perfectly useless room in his house.
VOA : special.2010.05.29
He also claims that he can solve the power problem that rendered Iridium phones useless inside buildings.
Well, those that cause real harm to patients are worse than those that are merely useless.
Applbaum and his team started going through it, before realizing that it was pretty useless.
FORBES: Inspired Ideas: How Radio Shack Contemporized A 90-Year Old Brand
useless，英文单词，形容词，意思是“无用的；无效的”。