mutable造句
31) Ironically, the performance benefit of the decision to make Point mutable is dwarfed by the additional cost of the defensive copying required by Point's mutability.
32) If the primary is a mutable sequence object list , the subscript must yield a plain integer.
33) In Java code, data structures are mutable by default, and you must add more code to make them act immutably.
34) But the mutable tubercle bacillus proved an elusive target, becoming resistant to each successive drug tried.
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