Pathology Sign-Out病理诊断室
Sign Goes Out灯号熄灭
This sign points out additional信息
Register Sign Out Information注册登录注销信息
single sign out单点登出
Sign out Procedure签退程序
why did you sign out你为什么要退出;你为什么登出
Master Key Sign Out Procedure万能钥匙签领程序
V（动词） to sign (one's name) to indicate that one is leaving a place 签字离开(一个地方)
he signed out for the evening