diff --git a/data/paper b/data/paper
index b6444f07..94eda168 100644
--- a/data/paper
+++ b/data/paper
@@ -1,6 +1,7 @@
 # 常见的查文献的网站,可以走实验室的代理或者在实验室直连
+# A common literature search website can go to the laboratory's agent or directly in the laboratory.
 
-# 中国
+# site in China mainland
 wanfangdata.com.cn
 cnki.net
 las.ac.cn
@@ -8,7 +9,7 @@ csdl.ac.cn
 cnki.net
 159.226.100.31
 
-# 国外
+# site not in china mainland
 knovel.com
 newisiknowledge.com
 computingreviews.com