To getting he better project of itsigning, it s necessary to find a correlative soft to simulate the sound boxs character in low frequency performance.

音箱的箱体参数对音箱的低频特性影响很大，为了减小音箱设计与制作过程中的盲目性，有必要研制与开发一套相关的软件对音箱的低音特性进行仿真。

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Some experts say it`s necessary to "wake up" these certificates and make use of them to bolster one`s job-hunting prospects.

一些专家称，有必要“唤醒”这类证书增加求职者的应聘砝码。

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So it 's necessary to study the damage in the fracture during hydraulic fracturing and find out corresponding method.

因此有必要对压裂过程中的裂缝损害进行研究并找出相应的解决措施。

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"Without land,one cannot do anything. Also,it's necessary to have a fund for the management of the land."

VOA: standard.2009.12.10

The fact that I have this star here, this star here, this star here, is really just 'cause I'm a little anal and it looks pretty to make a little box out of everything but it's not strictly necessary.

事实上大家可以看到，这有颗星，这有颗星，这有颗星，其实是我手痒,这看起来像是用*围成个框，把它们包围起来,其实这是完全没有必要的。

哈佛公开课 - 计算机科学课程节选

We're going to get a deep insight if it's a necessary truth about death that everyone dies alone.

如果这是对死亡来说必不可少的真理,那我们能得到一些深刻理解。

耶鲁公开课 - 死亡课程节选

"In the U.S. it's necessary to move potable water over distances greater than the length of U.K., " says Richard Manning, a Brit who runs the building products operation.

FORBES: Magazine Article

To hold onto the contract overnight, it's necessary to post a margin that depends on the contract's volatility and is set by the listing exchange.

FORBES: Money & Investing

But if it's necessary to have clean water in the Great Lakes in the 21st century, it's worth looking at.

NPR: Gov. Quinn Open To Great Lakes-Mississippi Split