Some parents now are choosing to save the cord blood, have it frozen, locked away somewhere just in case it is useful to their child later in life.

现在有些父母选择保存脐带血，把它冷冻起来，锁在某个地方，以防日后对孩子有用。

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Can you persuade the man on the Clapham omnibus that it is useful?

你能让普通人相信这个很有用吗？

《牛津词典》

It is useful in many ways, especially for people with disabilities.

它在很多方面都很有用，尤其是对于残疾人。

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It is also useful because the mold can be used over and over again to make exact copies of the ceramic form.

VOA: special.2009.09.09

It would be so easy if you built a cohesive system that carries the entire transaction to create a receipt that is useful.

如果你建立一个,能覆盖整个交易过程,能产生有效的收据的系统,一切都会变得更容易。

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English is a very good language to learn and it's very useful,

英语是一门值得学习的语言，它非常地实用，

要继续努力 - SpeakingMax英语口语达人

Fine, but that implies it is useful for someone to be selling these kinds of instruments.

ECONOMIST: The contract between society and banks will get stricter

It is useful to continue to deepen and broaden your individual skills and abilities.

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To be frank, there's a lot going on here, and not all of it is useful.

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