注意每个级别仅仅与它上面或者下面的级别通信。

Notice that each level only communicates with the level above or below.

youdao

“我们还建了沼泽桥，”马西埃 (Macie) 说，“你需要将一些支撑的原木放在下面，去掉上面的树皮，因为它们腐烂的很快。”

"We also built bog bridges, " Macie says. "You need to take the supportive logs underneath and remove their bark because the bark can rot quickly."

youdao

看看上面的图和下面的数字吧。

See the graph above and below for the numbers.

youdao

We have above the line a concept and we have below the line a sound image.

这条线的上面是一个概念,下面是声音所代表的图像。

耶鲁公开课 - 文学理论导论课程节选

Now, if you look on your handout, there's a reconstruction of this tent-like sanctuary at the top as well as a schematization of its contents below.

你们可以看一下我发的材料，最上面有对这个像帐篷一样的圣所的重组,下面有对这个圣所里面内容的图示。

耶鲁公开课 - 旧约导论课程节选

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选