单词	直立梯
释义	直立梯vertical ladder
随便看	user class restructure user class service user cluster language user coded instruction user-coded virtual memory user cognition user command user completion code user connection time user contract administrator user control user control block table user controlled searching user control store user coordinate user coordinate system user coordinate system{=ucs} user correlator user cost user cpu time user created library user data user data area user data constraint user datagram protocol