Here, for example, we're calling the MCD function.

例如，们在这里调用 MCD 函数。

So you could do something like grep foobar in MCD, it's there.

所你可在 MCD 中执行类似 grep foobar 的操作，就在那里。

So now for example let's look at MCD and it has the comment that we were looking for.

现在让们看看 MCD，有们正在找的评。

So now it looks like nothing happened, but now the MCD function has been defined in our shell.

所现在看起来好像什么也没发生，但现在 MCD 函数已经在们的 shell 中定义了。

So we can now for example do MCD test, and now we move from the tools directory to the test directory.

因此，们现在可进行 MCD 测试，现在们从工具目录移动到测试目录。

Here we have the MCD function, that has been defined, and the thing is so far, we have just kind of seen how to execute several commands by piping into them, kind of saw that briefly yesterday.

这里们已经定义了 MCD 函数，到目前为止，们刚刚看到了如何通过管道输入多个命令来执行们，昨天简单地看到了这一点。