A real complicated engineering surface was used to verify its properties in extraction of mean line and roughness and satisfactory results were obtained.

对一个实际工件进行测量提取表面中线和粗糙度，结果令人满意。

youdao

Mean line: Imaginary line which runs along the top of the lower-case letters in a line of text.

中间线：在一行英文字里，沿着小写字母上端的一条假想线条。

youdao

All right, good. So the pink line is actually going to get steeper, but I know what you mean.

说得很好,但粉色的线会变陡峭,我理解你说的意思了

耶鲁公开课 - 博弈论课程节选

I mean, I think the line is very blurred between the classes here.

这里的社会等级意识真的很模糊。

美国贫富差距？ - SpeakingMax英语口语达人

So I've used this jargon before; command line arguments, but what does that really mean?

我之前也用过这个术语，命令行参数，但是这实际上是什么意思？

哈佛公开课 - 计算机科学课程节选

In mid Wales, that may mean a line of 50 metre (164ft) pylons carrying 400, 000 volt electricity cables from Montgomeryshire to near Shrewsbury.

BBC: Why many in rural Wales worry over power and pylons

Since 1996, energy balance measurements have been carried out in the vicinity of the mean equilibrium line 5150 m a.s.l. on Zongo Glacier 2.1 km .

UNESCO: Dublin Core

' So Orson says, 'What does it mean crossing the line?

WSJ: Bari Weiss: David Mamet's Coming Out Party