Each pattern stands for a distinct chemical element, and so different sets or patterns of spectral lines mean that the star has a different chemical composition.

每一种样式代表一种不同的化学元素，所以光谱线的不同集合或模式意味着这颗恒星有不同的化学成分。

youdao

By special Lines of Argument I mean the propositions peculiar to each several class of things, by general those common to all classes alike.

我指的论述的特殊方向是专属于几类事项的命题，而一般方向是对各类事项来说都很普遍的命题。

youdao

But what is clear in almost every case, however, is that the advances in online networking mean the lines between professional and personal are becoming increasingly blurred.

但是，有一点很明确，无论如何，网络在线的优势意味着专业和个人之间的分界线开始变得越来越模糊。

youdao

Yet increased recruitment of Asian-Americans doesn't mean that more are on the front lines.

VOA: standard.2010.07.14

Such deals will succeed mainly by cutting capacity, which may mean product lines or branches, but almost always means jobs.

ECONOMIST: How to make mergers work

Mobile payments could save it some money on credit card-related fees, mean fewer lines in stores, and also give a swift kick to skittish revenue growth.

FORBES: Connect

And that mean assigning clear lines of responsibility.

WHITEHOUSE: Security Review on Attempted Terrorist Attack