Make no useless acquaintances.
不跟差劲的人来往。
Make no useless movements or sounds.
不做有益的动作，不发出有益的声响。
There is no useless experience etc, if you want to do it.
另外，所有的经验都有用，只要你想做。
The Collie is a lithe, strong, responsive, active dog, carrying no useless timber, standing naturally straight and firm.
柯利犬是一种柔韧、结实、积极、活泼的品种，意味着他没有无价值的地方，自然站立时，整齐而稳固。
Both guilt and anger are useless for us. They give us no advantage.
内疚和愤怒是没有用的，对我们无任何益处。
噢，不必了，这是没有用的。
It is useless/no use waiting here doing nothing.
无所事事地等待是没有用的。
There's no logic in spending money on useless things.
把钱花在无用的东西上是没道理的。
No matter how useless Garbage sounds, Virginia Matzek of Santa Clara University will try to change your impression of it.
无论垃圾听起来多么无用，SantaClara大学的Virginia Matzek将要试图改变你对它的印象。
She writes that no wild cat would indulge in such useless behavior: "A cat wants to catch the mouse, not chase it in circles forever."
他写道任何一只野猫都不会沉溺于这种无意义的行为：“一只野猫会去抓耗子而不是转来转去毫无休止的抓那些光点”。
But no matter how good your tools are, they're useless without a good plan that defines how to get where you want to go.
但不论您的工具有多好，没有一个好的计划来定义如何达成您的目标，这些工具还是毫无用处的。
If knowledge disseminated by science communication experts is too abstract or useless in actual production, science communication will have no significant effect.
如果由专家进行的知识传播过于抽象或者在生产中没有实效，那么科学传播将产生不了显著的影响。
This method is essentially useless for the conditions discussed here because no errors are detected.
此方法除了在这里讨论的情况外毫无用处，因为没探测到错误。
A truly "secure" program would have no inputs, but that program would be useless.
真正“安全”的程序应该没有任何输入，但那种程序是没有用处的。
Caching in this case is worse than useless; because it costs more to put data in the cache to begin with, this sort of application would perform poorer overall than with no cache at all.
在这种情况下，缓存不但没有帮助，反而会更糟；因为它将数据放入缓存需要更多的开销，与没有缓存的情况相比，这种应用程序的性能更加糟糕。
For example, a timestamp with no time zone is acceptable for a single locale but useless in a multi-locale environment.
例如，没有时区的时间戳在单一地区的情况下可以接受，但在多地区环境中却不能。
Abandon perfectionism. It is a useless pursuit with no end. It creates stress and unhappiness. Learn to find the balance point between good enough and peaceful living.
放弃对于完美的追求，这种无用的追求永无止境，它只能带给你压力与痛苦。尝试在出色和平和的生活间寻找一个平衡点。
So it's almost as if functions really are useless because they have no ultimate effect.
所以几乎是函数是没起作用的,因为它们没有最终的效果。
Superconductors only work at extremely low temperatures, rendering them practically useless because the energy used to cool them to those temps cancels out the benefit of no energy loss.
超导体只在极低的温度下发挥作用，几乎可以认为它们没什么用，因为那些用于将它们降到极低温度所消耗的能量抵消了其不产生能量损失的优势。
There is no other clothing element in the male repertoire as socially symbolic and functionally useless as the tie.
在男性身上没有什么服饰配件能够像领带一样代表社会地位却没什么功能的。
They have a point. In nature, drone bees are poor, useless things that produce no honey and have no sting.
他们之所以这样做是有道理的，因为他们认为这些可伶的“雄蜂”从本质上讲是既不能酿蜜也不会蜇人。
As for recycling, it is useless to urge people to salvage stuff for which there are no buyers.
至于回收，督促人们回收没有买家的物品是毫无作用的。
No log files or errors are reported, just a useless "installation ended prematurely" message.
没有日志文件也没有报告任何错误，只给了一句没用的“安装提前结束”信息。
No matter which kind of knowledge to intelligence are useful, it can put useless things and keep a good thing.
掌握无论哪一种知识对智力都是有用的，它会把无用的东西抛开而把好的东西留住。
No matter which kind of knowledge are useful to our intelligence. It can throw out something useless and the hold of a good thing.
掌握无论哪一种知识对智力都是有用的。它会把无用有东西抛开而把好的东西保留住。
No chance, ability will be useless.
没有机会，能力将毫无用处。
No knowledge is useless, but it is difficult to find a branch of learning that can synthesize all useful knowledge.
柳先生的声音很小，但很清晰：“没有一种知识是无用的，但是也很难有一个学科能综合一切有用的知识。
No knowledge is useless, but it is difficult to find a branch of learning that can synthesize all useful knowledge.
柳先生的声音很小，但很清晰：“没有一种知识是无用的，但是也很难有一个学科能综合一切有用的知识。
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