Adjective:

1. of no value

Such attitudes are valueless unless they reflect inner cognition and certainty.

这种态度如果不能反映内心的认知和把握就毫无价值。

His grandeurs were stricken valueless ; they seemed to fall away from him like rotten rags.

他的荣华一下子变得一钱不值,好像一些碎布片似的从他身上脱落下去了.

The diamond on her ring is actually man - made, and so almost valueless.

她戒指上的那颗钻石其实是水钻,不值什么钱.

That bracelet is a cheap, valueless piece of jewelry.

那个手镯是一件便宜的 、 不值钱的首饰.

A book that he considered valueless proved invaluable to the library.

他认为毫无价值的书对图书馆来说却非常贵重.

These paintings have been ruined and are now valueless.

这些油画都已毁坏,所以现在就无价值了.

This jewellery valueless; it is made of glass and ordinary metals.

这首饰不值钱, 它是由玻璃和普通金属做的.

The necklace is valueless.

这项链不值钱.

Such data are not valueless, however.

然而,这些信息仍具有研究价值.

These materials are now valueless ( worthless ) to us.

这些材料现在对我们毫无价值了.

These blocks you are trampling under foot, like valueless stones, contain the purest ore.

你们这样满不在乎地用脚踢来踢去的石头, 里面都含着黄金.

This is not to say that sport fighting is valueless in teaching self - defence .

这决不是说竞技拳击对 自卫 毫无用处.

The price of a security may move up or down, and may become valueless.

证券价格可升可跌甚至变成毫无价值.

This paper is of great valueless of consulting to reasonable investments and evading risks in bussiness.

本文对业主公司合理投资及规避风险具有参考价值.

invaluable，valueless

这一对形容词都是来自名词value.一个是在形容词valuable（有价值的）之前加上否定形容词前缀in-；另一个是在名词value（价值）的后面加上否定形容词后缀-less.虽然它们都是加上否定的形容词词缀，意义刚好相反。

invaluable意思是“非常贵重的”，（highly valuable，precious），其同义词是priceless.

valueless意思是“毫无价值的”，其同义词是worthless.