This paper introduces a principle of how to measure individual circular pitch error and total cumulative pitch error, at the same time comparative method is put forward.

文章介绍了单个齿距偏差和齿距累积总偏差的测量原理，同时也介绍了相对法的测量方法。

youdao

With the same recipe, shorter cure time, comparative smaller degree of two laser beams and thinner PDLC film give rise to higher diffraction efficiency.

较小的膜层厚度、较小的光束夹角和较短的曝光聚合固化时间有利于衍射效率的提高。

youdao

They said she did not spend enough time on comparative studies.

VOA: special.2010.01.17

Even if an executive is a better typist than his secretary, it pays him to hire her to do his typing, because that frees up his time for work in his area of comparative advantage: helping run the company.

FORBES: No President Obama, We Can't "Outcompete" Other Countries

Though I have never been convinced that comparative periods of performance have any predictive value, I think comparing chart patterns from different historical time frames can improve our perspective.

FORBES: Will 2012 Be a Repeat of 1998?