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standard ruler

  • 标准尺，标尺

网络释义英英释义

  标准尺

... 标准齿轮 master gear 标准尺 standard ruler 标准尺寸 module ...

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Standard ruler

  • abstract: A standard ruler is an astronomical object whose approximate size is known. By measuring its apparent angular diameter in the sky, one can determine its distance from Earth.

以上来源于: WordNet

双语例句

  • The X-ray image principle and the mark ruler and standard sphere are introduced in this paper. The error from the mark ruler is also analyzed in the paper.

    本文介绍了该系统的X射线成像原理、光路分析以及标尺和参考球的使用，并对标尺的固有误差作了分析。

    youdao

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