如果没有标记消息，只需忽略它即可。

If there's no tag message, it's simply omitted.

youdao

清除所有已经分配但没有标记的对象，收回这些对象使用的空间。

All the objects that were allocated but are not marked anymore are swept away, and the space used by them is reclaimed.

youdao

现在，我们注意到x轴实际没有标记为度数，看起来不是很好。

Now, we notice that the X-axis is not really marked in degrees and does not look good.

youdao

They're not color-coded, so how you do you find them?

它们没有彩色标记,你怎么找到它们呢

耶鲁公开课 - 生物医学工程探索课程节选

It gives a sense of what this music is all--really all about and since, as we were saying, so much classical music doesn't have a text with it we've got to have some markers in there to know what the composer is trying to communicate to us.

让我们了解这段音乐想表达什么，就像我说的，大部分古典音乐并没有文字注解，而我们需要一些标记,来告诉我们作曲家想用这段音乐告诉我们什么。

耶鲁公开课 - 聆听音乐课程节选

Suppose that there were some sort of genetic marker and, although we didn't have a tattoo that you would just have to look at, -- but you could have genetic counseling-- have your DNA examined and you could tell, if you had the DNA testing, how much time you had left.

假设有某种基因标记，虽然我们没有,让你不得不去看的在身上的标记了，但你可能会去做基因咨询-,检查你的DNA，如果你做了DNA化验的话，你就能知道自己还剩多少时间。

耶鲁公开课 - 死亡课程节选