This paper studies a four mode repairable system with special repair under special failure.

提出并研究了特殊故障需要特殊修理的四状态可修系统。

youdao

I have had a special relationship with Beijing Foreign Studies University these past two years.

过去两年，我同北京外国语大学形成了特殊的良好关系。

youdao

I have had a special relationship with Beijing Foreign Studies University these past two years.

过去两年，我同北京外国语大学形成了特殊的良好关系。

youdao