取代,更?,廢棄
Supersession \Su`per*ses"sion\, n. [Cf. OF. supersession. See {Supersede}.] The act of superseding, or the state of being superseded; supersedure. The general law of diminishing return from land would have undergone, to that extent, a temporary supersession. --J. S. Mill.
supersession n : act of replacing one person or thing by another especially one held to be superior [syn: {supersedure}]