服用稳定的碘元素会阻止危险碘同位素的摄入，碘同位素的半衰期仅为八天。
Taking stable iodine as a pill blocks the uptake of the hazardous radioisotope, which has a half-life of 8 days.
处于发育阶段的甲状腺就如同海绵一般源源不断的吸收碘；服用稳定的碘元素会阻止危险碘同位素的摄入，碘同位素的半衰期仅为八天。
The developing thyroid gland absorbs iodine like a sponge; taking stable iodine as a pill blocks the uptake of the hazardous radioisotope, which has a half-life of 8 days.
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