phase out
/feɪ̯z äʊ̯t/ 动词- To remove or relinquish the use of (something) little by little, either via discrete diminishing phases or (by extension) by continuous gradations; to remove in phases, or as if by phases (gradually). · Leaded petrol was phased out in the course of the 1990s.
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They must systematically phase out exhibits featuring large, wide-ranging mammals, focusing instead on species that can genuinely thrive within the spatial limitations of an urban footprint.
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