replacement
名词 replacement:
an event in which one thing is substituted for another
同义词:substitution, permutation, transposition, switch
the act of furnishing an equivalent person or thing in the place of another
同义词:replacing
someone who takes the place of another person
a person or thing that takes or can take the place of another
同义词:substitute
filling again by supplying what has been used up
同义词:refilling, replenishment, renewal
a person who follows next in order
同义词:successor