She knew it was useless to protest.
她知道抗议是没用的。
这支笔没用了。
But I put it to you that they're useless.
但我要告诉你，他们没用。
It is useless to speculate why he did it.
对他为什么这么做妄加猜测毫无用处。
The camel's feet, well adapted for dry sand, are useless on mud.
骆驼的脚十分适合干旱沙地，但在泥地上毫无用处。
Astronauts will make a final attempt today to rescue a communications satellite from its useless orbit.
宇航员们今天将做最后一次尝试，把一颗通讯卫星从它无用的轨道上拯救出来。
It is useless for you to tempt me!
你诱惑我是没有用的！
现在流眼泪也没用了。
It's useless to regret what has been done.
对已经做过的事后悔是没有用的。
It's useless to fire away with such trivial details.
喋喋不休地谈这些琐碎细节是无用的。
It's not that measures such as London's Ulez are useless.
这并不是说像伦敦的超低排放区（Ulez）这样的措施毫无用处。
I think that what compulsory voting would lead to would be useless votes.
我认为强制投票将产生许多无用的选票。
Silent genes accumulate random mutations, they reasoned, eventually rendering them useless.
他们推断，沉默基因积累随机突变，最终使它们变得无用。
Just the useless pieces, as I'm planning to purchase new set from Italy for the sitting room only.
只是一些没用的东西，因为我正打算从意大利买一套仅用于客厅的新家具。
Unless it is applied to real experiences, book knowledge remains theoretical and, in the end, is useless.
除非把书本知识应用到实践中去，否则它仍然停留在理论层面，这样最终就毫无用处。
While it is useless to argue against the demand for increased mobility, we must fulfill this demand efficiently.
既然反对日益增长的汽车需求毫无用处，我们就必须有效地满足这种需求。
The worsening global shortage could render millions of dollars of high-value life-saving equipment totally useless.
不断恶化的全球短缺的情况可能会使价值数百万美元的高价值救生设备变得毫无用处。
The worsening global shortage could render millions of dollars of high-value, life-saving equipment totally useless.
不断恶化的全球短缺状况可能会使价值数百万美元的高价值救生设备变得毫无用处。
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
然而，这种纯粹的视觉系统在恶劣天气下毫无用处，到了20世纪30年代，无线电通信开始用于空中交通管制。
It may not help you tie your shoe but that little plastic tip keeps the rest of the shoelace, the shoe string from unraveling into weak and useless threads.
它可能不能帮你系鞋带，但那小小的塑料头可以让鞋带的其余部分不会散开成脆弱无用的线。
It's useless worrying about it.
为这事担心无济于事。
He knew it was useless to protest.
他知道抗议是徒劳的。
我的法语不太行。
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