diff --git a/src/advance/concurrency-with-threads/concurrency-parallelism.md b/src/advance/concurrency-with-threads/concurrency-parallelism.md
index e8230106..4b4cb31d 100644
--- a/src/advance/concurrency-with-threads/concurrency-parallelism.md
+++ b/src/advance/concurrency-with-threads/concurrency-parallelism.md
@@ -4,7 +4,7 @@
 
 并行和并发其实并不难，但是也给一些用户造成了困扰，因此我们专门开辟一个章节，用于讲清楚这两者的区别。
 
-`Erlang` 之父 [`Joe Armstrong`](<https://en.wikipedia.org/wiki/Joe_Armstrong_(programmer)>)（伟大的异步编程先驱，开创一个时代的殿堂级计算机科学家，我还犹记得当年刚学到 `Erlang` 时的震撼，respect！）用一张 5 岁小孩都能看到的图片解释了并发与并行的区别：
+`Erlang` 之父 [`Joe Armstrong`](<https://en.wikipedia.org/wiki/Joe_Armstrong_(programmer)>)（伟大的异步编程先驱，开创一个时代的殿堂级计算机科学家，我还犹记得当年刚学到 `Erlang` 时的震撼，respect！）用一张 5 岁小孩都能看懂的图片解释了并发与并行的区别：
 
 <img alt="" src="https://pic1.zhimg.com/80/f37dd89173715d0e21546ea171c8a915_1440w.png" class="center"  />