单词	annulate
释义	annulate adjective an·​nu·​late ˈan-yə-lət  -ˌlāt : furnished with or composed of rings : ringed Word History First Known Use circa 1656, in the meaning defined above
随便看	sign up (for) sign up for sign up or on sign vehicle sign-off sign-on sign-out sign-up signa signable signage signages signal signal board signal box signal bridge signal halliard signal halyard signal noise ratio signal number signal oil signal plate signal red signal the retreat signal tower

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