diff --git a/mt-book.pdf b/mt-book.pdf
index d3e833a..0c5641f 100644
Binary files a/mt-book.pdf and b/mt-book.pdf differ
diff --git a/src/Chapter1/chapter1.tex b/src/Chapter1/chapter1.tex
index bd95163..cb79d4e 100644
--- a/src/Chapter1/chapter1.tex
+++ b/src/Chapter1/chapter1.tex
@@ -351,8 +351,6 @@ \subsection{对比分析}
 \vspace{0.5em}
 \end{itemize}
 
-\parinterval 借用机器翻译著名学者董振东先生对不同机器翻译方法的评价\footnote[1]{这里遵循董振东先生的话进行了重新表述}：基于规则和实例的机器翻译是傻子（依赖一定人工，在匹配规则和模板的情况下翻译质量高，但是系统泛化能力有限），统计和神经机器翻译是疯子（只依赖数据，不依赖人工书写规则或者模板，系统健壮性强，但是精度不稳定且翻译过程难以人工干预）。
-
 %----------------------------------------------
 \begin{table}[htp]{
 \begin{center}
diff --git a/src/ChapterPreface/Figures/figure-preface.tex b/src/ChapterPreface/Figures/figure-preface.tex
index 88d1ff4..5c68707 100644
--- a/src/ChapterPreface/Figures/figure-preface.tex
+++ b/src/ChapterPreface/Figures/figure-preface.tex
@@ -84,7 +84,7 @@
 
 % section 7
 \node [secnode,anchor=south,purple,fill=white,minimum height=6.3em] (sec7) at ([yshift=3em]sec6.north) {};
-\node [anchor=north] (sec7label) at (sec7.north) {\small{神经机器翻译实战\ \dash \ 参加一次比赛}};
+\node [anchor=north] (sec7label) at (sec7.north) {\small{神经机器翻译实战}};
 \node [anchor=north west,draw=purple,thick,fill=white,rounded corners] (sec7title) at ([xshift=-0.3em,yshift=0.3em]sec7.north west) {{\footnotesize\bfnew{\color{purple} 第七章}}};
 \node [conceptnode,minimum width=4em,anchor=south west,fill=ublue!15,thin,align=left,minimum height=4.2em] (sec7box1) at ([xshift=0.5em,yshift=0.4em]sec7.south west) {\tiny{数据处理、}\\\tiny{子词切分}};