石墨堆芯降低中子速度。

Thespeeds of neutrons are slowed down by the graphite core.

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中子和物质的反应速度与中子的密度、中子的速度、原子核密度以及特有的反应截面有关。

The reaction rate of neutrons with matter depends on the density of neutrons, their velocity, the nuclear density and the particular interaction cross section.

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脉冲中子氧活化测井是一种测量水流速度的测井方法。

Impulse oxygen activation logging is a recent version of oxygen activation method for water flow measurement.

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