The SPDC is responsible for projects with investment surpassing the set ceiling.

其中限额以上的项目由国家计委负责。

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Then state function of SPDC biphoton light field was derived and a probability explanation was given.

推导自发参量下转换双光子态的数学表达式，并给出其几率解释。

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Spontaneous Parametric Down-conversion(SPDC); correlated photon; quantum-efficiency; coincidence count;

自发参量下转换； 相关光子； 量子效率； 符合计数；

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"There has to be a very clear and consistent and regular reinforcement of the message that this type of engagement does not mean a tacit endorsement of the SPDC's crimes against humanity or its ongoing violations of human rights."

VOA: standard.2009.09.24

Fearing continued attacks, SPDC announced it was temporarily shutting down operations that will amount to a production loss of 455, 000 barrels per day -- 19 percent of Nigeria's output.

CENTERFORSECURITYPOLICY: Nigeria ablaze