sign on

sign on sign on on-sign 和 off-sign是什么意思 什么是 vCenter Single Sign On 什么是 vCenter Single Sign On Microsoft Single Sign-on Service ERROR SIGN IN PID,PLEASE SIGN IN ON CORRECT PID there a sign on the chair on mondaythere a sign on the chair on monday 'danger',the,sign,building,on,the,means(.) point to a sign on the the sign on the grass是什么意思 sign on the door什么意思 Does the sign on the cage interesting? The sign on the front door(　　):Push a sign of recognition on her face sign sign sign