w3c markup validation service造句

Duplicate anchors may be found by using the W3C Markup Validation Service.
Looking for a tool to capture the current URL and pass it to the W3C Markup Validation Service in another tab.
XHTML + RDFa documents can be validated individually online at the W3C Markup Validation Service or together with CSS and RSS at W3C Unicorn.
It's difficult to find w3c markup validation service in a sentence. 用w3c markup validation service造句挺难的