方程的中心

Question

 \documentclass[12pt, a4paper,fleqn]{report}

\doublespacing
\usepackage[comma,super,sort&compress]{natbib}
\bibliographystyle{rsc.bst} 
\usepackage{comment}
\setcounter{secnumdepth}{4}
\usepackage{graphicx}
\usepackage{amsmath}
\graphicspath{ {images/} }


\begin{document}
\section{Molecular dynamics simulations} 

....content....

\begin{equation}
\centering
m_\mathit{i} \frac{\delta^2\mathbf{r_\mathit{i}}}{\delta \mathit{t}^2}= \mathbf{F_\mathit{i}},\mathit{i} = 1....N.
\end{equation}

Answer 1

类fleqn选项使方程式左对齐（您特别要求此功能）。删除它会恢复默认行为：居中对齐。