Investigation of 10 patiente with an intake of tritiatedwater suggests that the body retention of tritium for a unit intake can beevaluated by a sum of two exponential functions: R~I(t) =0.987exp(-0.693t/10) + 0 .013exp(-0.693t/42).

• 对10名氘化水摄入者的观察结果表明；单位摄入量所致的体内氚滞留量R~I(t)可用两项指数函数之和来描述；即R~I(t)=0.；987exp(-0