The stage of the traditional family education has its positive effect. It is very useful for today' s family education to analyze its advantages and disadvantages.

传统的家庭教育有其积极的一面，也有其消极的影响，分析其利弊得失，对于今天的家庭教育或许会有一些启迪。

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The technology of single point diamond turning (SPDT) is a new technique widely used in the world since 1980's, it is very useful for ultra precision machining.

单点金刚石切削(SPDT)技术是上世纪80年代以来国际上推广应用的一项新技术，是实现超精密加工的有效技术途径。

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I think it's very useful. It may not be immediately apparent to people in Darfur, but in the end it is a contribution towards a solution to their problem."

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Now, it's also very useful to look at some of the relations that come out of these fundamental equations.

我们接下来可以考察,从这些基本方程中得出的一些方程。

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But as long as you remember that distinction, it's a very useful pattern.

只要你记住了二者的区别，这将会是一个非常有用的句型。

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"It's very useful to be able to have perfect recall on stuff, " he says.

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"It's very useful as a model system, " he said.

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While the color offset is fine for viewing baby's play habits, it's not very useful when trying to identify the colors of a perpetrator's clothing to police.

ENGADGET: WiFi Baby 3G review, or: How we learned to stop worrying and love a surveillance camera