Pre-solar grains are now estimated to make up a small part — only 100 parts per million — of the comet.

前太阳系颗粒估计填补了一小部分彗星成分——只有万分之一。

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When the pre-set time is up, the connecting passage is clear and the air-operated sounding element is forced to make sound by the airflow.

当达到预置时间时，连接通道畅通使气流作用于气动发声元件发声。

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Not just an added reinforcing ring, this unique pre-compression design compensates for expansion forces generated from normal tapered pipe thread joint make-up.

不仅仅增加了加固环，这种独特的预压缩结构能够抵消常规锥形管道螺纹连接结构所会产生的膨胀力。

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That means developing tech like an augmented reality heads-up display, currently in pre-development, which uses laser projected imagery to make it look like navigational arrows actually appear on the road, not on a separate GPS screen.

FORBES: Audi Touts Tech At CES

Our guess is that Bonds and Clemens, both of whom clearly put up Hall of Fame numbers during the pre-steroid era, will ultimately make it.

FORBES: Magazine Article

But they make up a smaller portion of the electorate in New Hampshire, where Huckabee ran third in pre-election polls.

CNN: Exit polls: Women push Clinton to New Hampshire win