我重新定义了\emph命令，使文本加粗和倾斜
\DeclareEmphSequence{\bfseries\boldmath\slshape, \itshape}
\emph但是，这似乎会影响所用行的水平间距。我只在tcbtheorem标题足够长的多行环境中注意到了这种影响。例如，如果定理已编号或具有可选标题。
我尝试使用斜体校正，但无法使间距保持一致。此外，我知道很多人不赞成使用粗体\emph，我可能会定义一个专门用于定义的新命令。
\documentclass{article}
\usepackage{lmodern}
\usepackage{amssymb}
\usepackage[many]{tcolorbox}
\usepackage[a4paper,margin=1.5cm]{geometry}
\newtcbtheorem[number within=section]{definition}
{Definition}{
enhanced,
detach title, fonttitle=\sffamily\bfseries,
coltitle=gray!70!black,
before upper={\tcbtitle\quad}
}{def}
\DeclareEmphSequence{\bfseries\boldmath\slshape, \itshape}
\begin{document}
\section{Introduction}
\begin{definition}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic} if it is complex differentiable at every point \(z \in \Omega\).
\end{definition}
\begin{definition*}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic} if it is complex differentiable at every point \(z \in \Omega\).
\end{definition*}
\begin{definition*}{test}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic} if it is complex differentiable at every point \(z \in \Omega\).
\end{definition*}
\begin{definition}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic}\dots
\end{definition}
\end{document}
答案1
如果您尝试不使用它，\emph您会看到differentiable只是挤压到行上，压缩间距，但是\emph粗体使得行更长并且不适合，并且 tex 选择拉伸空间而不是在段落的倒数第二行放置连字符。
最简单的方法是强制连字符，同时使用\linebreak（不是\\）来强制对齐行。
\documentclass{article}
\usepackage{lmodern}
\usepackage{amssymb}
\usepackage[many]{tcolorbox}
\usepackage[a4paper,margin=1.5cm]{geometry}
\newtcbtheorem[number within=section]{definition}
{Definition}{
enhanced,
detach title, fonttitle=\sffamily\bfseries,
coltitle=gray!70!black,
before upper={\tcbtitle\quad}
}{def}
\DeclareEmphSequence{\bfseries\boldmath\slshape, \itshape}
\showhyphens{differentiable}
\begin{document}
\section{Introduction}
\begin{definition}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is {holomorphic} if it is complex differentiable at every point \(z \in \Omega\).
\end{definition}
\begin{definition}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic} if it is complex differentiable at every point \(z \in \Omega\).
\end{definition}
\begin{definition}{}{}
Suppose \(\Omega \subseteq \mathbb{C}\) is open. Then a function \(f:\Omega\rightarrow\mathbb{C}\) is \emph{holomorphic} if it is complex differ-\linebreak entiable at every point \(z \in \Omega\).
\end{definition}
\end{document}