Knives are very useful things for cooking, for example, but can indeed be used for evil.

比如，当刀具用作烹饪时它是非常有用的，但它又确实可以被用来做坏事。

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So at the very least, we learned that the feature is useful enough to carry its weight - that it predicted correctly the vast majority of the time, making things easier for developers.

因此最起码我们了解到该功能是有用的且足以满足自身的需要—其在大多数时间的预测都是正确的，且对于开发人员来说事情变得更容易了。

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To do their part, the family decided to use waste from their own household and from their friends and neighbors to construct a very visual reminder of how many useful things we simply discard.

为尽一己之力，这家人决定把自家和朋友、邻居屋里的废弃物加以利用，让眼前的实物提醒人们多少有用的物品被轻易丢弃。

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One of the things about these plasmids that makes them very useful is that their entire base pair sequences is known.

质粒之所以有用,其中一个原因就是,它的全部碱基序列都是已知的

耶鲁公开课 - 生物医学工程探索课程节选

It depends on" is very useful when you're trying to make a decision when things are unclear and you're waiting.

当你在形势不明朗，仍在观望而无法做决定的时候，"It depends on"句型是一个非常有用的句型。

It depends on 课堂 - SpeakingMax英语口语达人

There are all kinds of things that it might be very useful ; for you to know as an inhabitant of Western civilization; and the New Testament,you might find out, would rank kind of down on the list of those kinds of things.

作为西方文明的一分子,有很多有用的东西可以学;,而新约，你会发现，与这些东西相比，排名比较靠后。

耶鲁公开课 - 新约课程节选

The GC-100-6 connects to a network switch (no Wifi built-in) and can do a few very useful things.

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"I think you could say she was a very useful lightning conductor, because she was saying things that other people sometimes felt but didn't want to say, " he says.

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But it does seem a bit sad to cut off a very interesting possible research project just as it starts to reach the sort of size where it might tell us some useful things.

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