行太长，即使有连字符建议

Question

我有一个段落以

\documentclass[a4paper,11pt,twoside]{book}
\setlength{\textwidth}{14.6cm}       
\hyphenation{MnTPPCl  CoTPP}
\begin{document}

We studied surface doping with the following molecules:
2,3,5,6-tetrafluoro-7,7,8,8-tetra\-cyano\-quino\-dimethane
(F$_4$TCNQ), manganese(III)-tetra\-phenyl\-porphyrin-chloride
(MnTPPCl), cobalt(II)-tetra\-phenyl\-porphyrin (CoTPP), and
fullerene (C$_{60}$).
\end{document}

最终在“(MnTPPCl)”处产生一条过长的线

即使提供了连字符的可能性，它还是会给我一个过长的行，并且“(MnTPPCl)”会突出。为什么不在“(MnTPPCl)”之前换行？我该如何避免这种情况？

Answer 1

如果没有完整的示例，就不可能进行测试，但据推测，断线(MnTPPCl)需要将空白拉伸到超过指定值。

您可以使用它\sloppy来告诉 LaTeX 允许空白延伸到超出其通常的限制。

或者像 egreg 建议的那样\emergencystretch，对排版质量进行不太剧烈的改变：

\documentclass[a4paper,11pt,twoside]{book}
\setlength{\textwidth}{14.6cm}       
\hyphenation{MnTPPCl  CoTPP}
\begin{document}
\setlength\emergencystretch{2em}

We studied surface doping with the following molecules:
2,3,5,6-tetrafluoro-7,7,8,8-tetra\-cyano\-quino\-dimethane
(F$_4$TCNQ), manganese(III)-tetra\-phenyl\-porphyrin-chloride
(MnTPPCl), cobalt(II)-tetra\-phenyl\-porphyrin (CoTPP), and
fullerene (C$_{60}$).
\end{document}