So how did this invisible line come to be?

那么，这条无形的线是如何形成的？

Rather than using a red lip liner, I like to do an invisible lip line.

与其使用红色唇线笔，我更喜欢画隐形唇线。

They acted like they were our friends until we crossed an invisible line and they very suddenly weren't.

他们表现得好像他们是我们的朋友，直到我们跨越了一条无形的界限，但他们突然就不是了。

On the other hand, there's a group over here--two guys and two girls--and they're standing with this like invisible line between them.

另一方面，这里有一群人——两个男孩和两个女孩——他们站在那里， 就像他们之间有一条看不见的线。

Henry already hears nearly everything about Alex's current life, but talking about how they grew up has always been some invisible line of demarcation.

亨利已经听说了关于亚历克斯现在生活的几乎所有事情，但谈论他们如何成长一直是一些无形的分界线。

In general, this invisible line separating the more developed East from the more rural West follows the 98th Meridian of longitude, and it sharply divides the American population in half.

总的来说，这条分隔较发达的东部和较落后的西部的看不见的线，沿着子午线 98 度，将美国人口直接分成两部分。

If you drive from the East to the West across this invisible line at any point, you will immediately notice the sharp difference in the distances between communities, gas stations, and general stores.

如果你从东部开车到西部，在这条看不见的线的任何一处位置，你都会立即注意到社区、加油站和普通商店之间的巨大差异。

Wallace's invisible line may not be real in a physical sense, but it shows just how loudly ancient geological events can echo through time, and how they shape the diversity and distribution of life in strange and contrasting ways.

华莱士的隐形线在物理意义上可能并不真实，但它显示了古代地质事件可以在时间中产生多么响亮的回声，以及它们如何以奇怪和对比的方式塑造生命的多样性和分布。