LaTeX 有时会在句号后放置太多或太少的空间
LaTeX 尝试猜测句号是否结束一个句子，在这种情况下，它会在句号后面添加额外的空格。 下面是两个猜测错误的例子：（
I watched Superman III. Then I went home.
“Superman III”之后的空格太少。）
After brushing teeth etc. I went to bed.
（“etc.”之后的空格太多。）
请注意，自 LaTeX 以来，在 LaTeX 源代码中使用多少空格并不重要。忽略这一点。
LaTeX tries to guess whether a period ends a sentence, in which case it puts extra space after it.
Here are two examples where it guesses wrong:
I watched Superman III. Then I went home.
(Too little space after "Superman III.".)
After brushing teeth etc. I went to bed.
(Too much space after "etc.".)
Note that it doesn't matter how much whitespace you use in the LaTeX source since LaTeX ignores that.
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我在这里找到了答案：http://john.regehr.org/latex/。摘录：
当非句尾句号后跟空格时，空格必须是明确的空格。
因此，第二个示例应该是：
当输入中的大写字母位于句尾句点之前时，会发生此问题的相反情况，如第一个示例所示。
在这种情况下，LaTeX 假定句点终止一个缩写，并在其后面跟随词间空格而不是句子间空格。
解决方法是将“
\@”放在句号之前。所以第一个例子应该是
找到这个错误的一个方便的方法是：
I found the answer here: http://john.regehr.org/latex/. Excerpt:
When a non-sentence-ending period is to be followed by a space, the space must be an explicit blank.
So the second example should be:
The converse of this problem happens when a capital letter precedes a sentence-ending period in the input, as in the first example.
In this case LaTeX assumes that the period terminates an abbreviation and follows it with inter-word space rather than inter-sentence space.
The fix is to put "
\@" before the period.So the first example should be
A handy way to find this error is:
如果您喜欢在句子末尾添加单个空格，则可以回避间距问题：将
\frenchspacing打开（对于旧版本的 Latex，这是一个脆弱的命令）。高德纳遵循传统的命名方式，将其称为法式间距，尽管在句子后称双倍间距法式间距已在出版业中占据主导地位。Dirk Margulis 写了一篇很好的文章，总结了单间距盛行的一些原因： 句子之间有空格。
You can sidestep the spacing issue if you prefer single spaces at the end of sentences: put
\frenchspacingon (for older versions of Latex this was a fragile command). Knuth was following the traditional naming in calling it French spacing, although calling double spacing after sentences French spacing has become dominant in publishing.Dirk Margulis wrote a nice post summarising some of the reasons for the prevalance of single spacing: Space between sentences.
我也喜欢 drreves 的答案和他建议的便捷搜索。我没有 Stackoverflow “rep” 点来评论，但是...
由于原始 *.tex 中的行往往很长，因此 grep 的输出可能会很庞大（即整个段落）；我建议采用一种变体，仅显示以“[AZ]”结尾的单词。 （后跟一个或多个空格，后跟一个新的大写单词）。这是，
I like the answer from dreeves and the handy search he suggests too. I don't have the Stackoverflow "rep" points to comment, but...
Since lines in raw *.tex tend to be very long, the output from grep can be overwhelming (i.e., entire paragraphs); I suggest a variation to only display the words ending in '[A-Z].' (followed by one or more space, followed by a new capitalized word). It is,