英 [ˌɒbsəˈlesəns] 美 [ˌɑːbsəˈlesəns]
n. 过时；淘汰，废弃
obsolescence /ˈɒbsəˌlɛsəns/
不可数名词 Obsolescence is the state of being no longer needed because something newer or more efficient has been invented. 过时; 淘汰
The aircraft was nearing obsolescence by early 1942.
这种飞机在1942年年初就濒临淘汰了。
the process of becoming obsolete; falling into disuse or becoming out of date
a policy of planned obsolescence
报废-引用次数：6
参考来源流程式生产企业备件供应管理研究
过时
陈旧
淘汰-引用次数：5
But for varies reasons, the process, the reason, the consequence of obsolescence and so on were not always reasonable.
但由于种种原因，计算机装备的淘汰原因、过程、后果等并不总是科学合理的。
参考来源教育装备淘汰的合理性调研与分析
（器官的）废退
退化
... Transfer：转移 Obsolescence：过时 rate of obsolescence：淘汰的速度，更新换代的速度 ...
... observationtest观察性抽查，观测性抽查 obsolescence陈旧 obsoleteasset陈旧资产 ...
... observing注意的 obsolescence废弃 obsoletename作废的名称 ...
... obligation n.义务,职责,债务 obsolescence n.逐渐过时；荒废,退化 odd adj.奇数的,单只的；带零头的,余的；古怪的 ...
obsolescent 荒废的；即将过时的；逐渐被废弃的
[生物]退化；荒废
The aircraft was nearing obsolescence by early 1942.
这种飞机在1942年年初就濒临淘汰了。
Every Apple product has obsolescence built in, and if I lose my laptop's power cord, they charge me $80 for a new one.
苹果公司的每一款产品采用“过时”的内置设计，如果我的电源线丢了，另换一根就得向他们支付80美元。
In some cases, industrial giants faced with little or no competition seek to avoid the capital loss resulting from obsolescence by deliberately obstructing technological progress.
在某些情况下，面对很少竞争或没有竞争的工业巨头为了避免因被淘汰而造成的资本损失，他们会故意阻碍技术进步。
The system was entrenched by the early 1980s, but it ran into problems of obsolescence.
The old Zulu traditions of strong marriages and healthy families had faded into obsolescence.
However, the window of opportunity created by the obsolescence of the iPhone 4 is closing.
FORBES: Weak Rivals Ensure Apple's Dominance For Another iPhone Generation