强调了极低剂量率电离辐射诱导适应性反应的可能及其剂量效应和时间效应关系的特点。

Emphasis is given to the characteristics of the dose response and time response relationships of adaptive response induced by extremely low dose rate ionizing radiation.

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目的：观察低剂量辐射诱导胸腺细胞DNA裂解适应性反应的剂量率效应。

Objective To observe the dose-rate effects of adaptive response of thymocyte DNA lysis induced by low dose radiation.

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目的：观察X线低剂量辐射诱导胸腺细胞凋亡和细胞周期进程适应性反应的剂量率效应。

Objective: to observe the dose rate effect of adaptive response of thymocyte apoptosis and cell cycle progression induced by low dose X ray radiation.

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