durability
 經久;耐久性
 Du·ra·bil·i·ty, n.  The state or quality of being durable; the power of uninterrupted or long continuance in any condition; the power of resisting agents or influences which tend to cause changes, decay, or dissolution; lastingness.
    A Gothic cathedral raises ideas of grandeur in our minds by the size, its height, . . . its antiquity, and its durability.   --Blair.
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 durability
      n : permanence by virtue of the power to resist stress or force;
          "they advertised the durability of their products" [syn:
          lastingness, enduringness, strength]