We can only move slowly, so we need a shell to protect us.

我们只能慢慢地移动，所以我们需要一个壳来保护我们。

youdao

By default, Z shell saves only the last 30 commands.

在缺省情况下，Z Shell仅保存最后的30条命令。

youdao

At the top right is a list of all modules within this enterprise application; this list is empty because the enterprise application is still only an empty shell.

右上方是该企业应用程序内所有模块的列表；这个列表是空的，因为该企业应用程序还只是一个空壳。

youdao

So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

麻省理工公开课 - 化学原理课程节选

If you want to understand whether compounds form or not look only at the valence shell.

如果你想理解化合物是否形成,而不仅仅只是看看价层。

麻省理工公开课 - 固态化学导论课程节选

So we actually only need two electrons to fill up the valence shell of hydrogen, remember that's because all we need to fill up is the 1 s.

我们其实只需要两个电子,就可以将氢的价壳层排满，要记得这是因为我们只需要排满，1，s，轨道。

麻省理工公开课 - 化学原理课程节选

Krista Eberle, director of food safety programs at the Egg Safety Center, reiterated that only shell eggs are affected by the Wright County recall.

CNN: STORY HIGHLIGHTS

Only shell eggs are affected by the recall, the company said.

CNN: STORY HIGHLIGHTS

The Foreign Relations Committee is only a shell of what it was when the influential Arkansas Democrat was its chairman from 1959 to 1974.

CNN: Senator No