the act (by someone having the authority) of annulling something previously done;
"the revocation of a law"
例句
用作名词(n.)
No proceedings for the forfeiture or revocation of a patent may be instituted before the expiration of two years from the grant of the first compulsory license.自授予第一个强制许可之日起两年届满前不得提起取消或撤消专利的诉讼。
