10: %A simple table. The center environment is first
set up, otherwise the
11: %table is left aligned. The tabular environment
is what tells Latex
12: %that the data within is data for the table. 13:
你应该能猜到，凡是跟在 % 后面的都是注释。 在这一小节，我们来尝试一下表格的输入。 先起一个新“环境”，叫 center ：
C-c C-e center C-j
得到：
1: % 此处略去数十行 2:
3: \\subsection{Sectioning Commands} 4: \\label{sec:sectioning-commands}
5: The commands for inserting sections are fairly
intuitive. Of course,
6: certain commands are appropriate to different
document classes.
7: For example, a book has chapters but a article
doesn't.
8:
9: %A simple table. The center environment is first
set up, otherwise the
10: %table is left aligned. The tabular environment
is what tells Latex
11: %that the data within is data for the table. 12:
13: \\begin{center} 14:
15: \\end{center} 16:
center 当然是“居中”的意思了。在 center 环境里面，我们添加一个 tabular 环境：
C-c C-e tabular C-j
这时你会看到这样的提示：
(Optional) Position:
直接 C-j ，又看到提示了：
Format:
这是问你，表格的格式……有几列？每列之间要不要有竖线分割？……我的答案是这样：
|l|l|
也就是：竖线（|）小写L（l）竖线（|）小写L（l）竖线（|）。小写L代表 left ，也就是“左对齐”的意思。那么，你应该恍然大悟了，不就是……竖线-左对齐-竖线-左对齐-竖线嘛。那么，举一反三，除了小写L，我们还会见到r（右对齐）和c（居中）。现在，
C-j
得到如下结果：
1: % 此处略去数十行 2:
3: \\subsection{Sectioning Commands} 4: \\label{sec:sectioning-commands}
5: The commands for inserting sections are fairly
intuitive. Of course,
6: certain commands are appropriate to different
document classes.
7: For example, a book has chapters but a article
doesn't.
8:
9: %A simple table. The center environment is first
set up, otherwise the
10: %table is left aligned. The tabular environment
is what tells Latex
11: %that the data within is data for the table. 12:
13: \\begin{center}
14: \\begin{tabular}{|l|l|} 15:
16: \\end{tabular} 17: \\end{center} 18:
表格环境里也是可以有注释的：
1: % 此处略去数十行 2:
3: \\subsection{Sectioning Commands} 4: \\label{sec:sectioning-commands}
5: The commands for inserting sections are fairly
intuitive. Of course,
6: certain commands are appropriate to different
document classes.
7: For example, a book has chapters but a article
doesn't.
8:
9: %A simple table. The center environment is first
set up, otherwise the
10: %table is left aligned. The tabular environment
is what tells Latex
11: %that the data within is data for the table. 12:
13: \\begin{center}
14: \\begin{tabular}{|l|l|}
15: % The tabular environment is what tells Latex
that the data within is
16: % data for the table. The arguments say that
there will be two
17: % columns, both left justified (indicated by
the 'l', you could also
18: % have 'c' or 'r'. The bars '|' indicate
vertical lines throughout
19: % the table. 20: | (hline) 21: \\end{tabular} 22: \\end{center} 23:
现在我们开始画表格，边画边体会一下上面几行注释的意思吧。光标现在应该在第(hline)行，先画一条横线：