为摄入放射性物质的时刻的英文

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• 为:    support; stand for
• 摄:    absorb; assimilate ...
• 入:    enter
• 放射性:    radioactivity; act ...
• 物质:    matter; substance; ...
• 的:    4次方是 The fourth po ...
• 时刻:    time; hour; moment