diff --git a/cf-v4-ddns.sh b/cf-v4-ddns.sh
index da4fe32..136a18d 100644
--- a/cf-v4-ddns.sh
+++ b/cf-v4-ddns.sh
@@ -28,15 +28,19 @@ set -o pipefail
 
 # API key, see https://www.cloudflare.com/a/account/my-account,
 # incorrect api-key results in E_UNAUTH error
+# 填写 CF全局Global API Key
 CFKEY=
 
 # Username, eg: user@example.com
+# 填写 CloudFlare 登陆邮箱
 CFUSER=
 
 # Zone name, eg: example.com
+#填写需要用来 DDNS 的一级域名
 CFZONE_NAME=
 
 # Hostname to update, eg: homeserver.example.com
+# 填写 DDNS 的二级域名(只需填写前缀)
 CFRECORD_NAME=
 
 # Record type, A(IPv4)|AAAA(IPv6), default IPv4