如果吸入或吞食放射性碘，放射性碘会集中于甲状腺，那么患甲状腺癌的风险就会提高。
If breathed in or swallowed, it will concentrate in the thyroid gland and increase the risk of thyroid cancer.
但是如果处于危险环境的人们预先摄入含有非放射性碘的药物，这些碘就会先到达甲状腺并且有效地防止对放射性的碘的吸收。
But if people at risk receive tablets containing non-radioactive iodine, this reaches the thyroid first and effectively prevents the radioactive isotopes being absorbed.
但是，暴露在高水平放射碘下的人会得甲状腺癌。碘化钾能够阻止人体吸收放射性碘，降低癌症风险。
But people exposed to high levels of radioactive iodine can get thyroid cancer. The pills block the thyroid from absorbing radioactive iodine and reduce the cancer risk.
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