luci-app-firewall: zh_CN: update Simplified Chinese translation

Signed-off-by: Zheng Qian <sotux82@gmail.com>

applications/luci-app-firewall/po/zh-cn/firewall.po

@@ -125,7 +125,7 @@ msgid "Enable logging on this zone"
 msgstr "启用此区域的日志记录"
 
 msgid "Experimental feature. Not fully compatible with QoS/SQM."
-msgstr ""
+msgstr "实验特性。与 QoS/SQM 不完全兼容。"
 
 msgid "External IP address"
 msgstr "外部 IP 地址"
@@ -179,7 +179,7 @@ msgid "General Settings"
 msgstr "基本设置"
 
 msgid "Hardware flow offloading"
-msgstr ""
+msgstr "硬件流量卸载"
 
 msgid "IP"
 msgstr "IP"
@@ -330,7 +330,7 @@ msgid "Refuse input"
 msgstr "拒绝入站"
 
 msgid "Requires hardware NAT support. Implemented at least for mt7621"
-msgstr ""
+msgstr "需要硬件 NAT 支持。目前 mt7621 已实现"
 
 msgid "Restart Firewall"
 msgstr "重启防火墙"
@@ -359,7 +359,7 @@ msgid "Rewrite to source %s, %s"
 msgstr "源地址改写成 %s, %s"
 
 msgid "Routing/NAT Offloading"
-msgstr ""
+msgstr "Routing/NAT 卸载"
 
 msgid "Rule is disabled"
 msgstr "规则已禁用"
@@ -377,10 +377,10 @@ msgid "Saturday"
 msgstr "星期六"
 
 msgid "Software based offloading for routing/NAT"
-msgstr ""
+msgstr "基于软件的 Routing/NAT 卸载"
 
 msgid "Software flow offloading"
-msgstr ""
+msgstr "软件流量卸载"
 
 msgid "Source IP address"
 msgstr "源 IP 地址"