过气的英文：
obsolescent
become obsolete
dying out
go out of use
outdated
go out of style
on the wane
ex-

参考例句：
  • an ex-soldier
    过气军人
  • “A diamond is forever”. Always in fashion, never go out of style, year in and year out.
    钻石是永恒的，永远时髦，永不过气，年年如此。
  • A breathless flight
    令人喘不过气的飞行
  • At first, I used to run out of breath quickly, but now I can just keep on swimming.
    起初我会很快喘不过气，但现在就可以一直游下去。
become是什么意思：
v. 成为；变得；适合；相称
  • To become blunt.
    变钝，变迟钝
  • To become inflated.
    膨胀变得充了气的。
  • To become firm or gelatinous; congeal.
    凝固凝结或变硬；冻结
obsolete是什么意思：
adj. 废弃的；老式的
n. 废词
v. 淘汰；废弃
  • Antiquated;ancient;long obsolete.
    过时的；古老的；久已作废的
  • This phrase tends to become obsolete.
    这个短语已渐渐成为废词。

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