What was termed a small amount of radioactive iodine had, indeed, been released.

据说事实上还是有一小部分的放射性碘泄露了。

youdao

Radioactive iodine has a half-life of eight days and decays naturally within weeks.

放射性碘的半衰期为八天，几周内自然衰变。

youdao

Unlike radioactive iodine, which has a short half life, cesium lingers in the environment.

碘驻留期短一半，而铯则悬浮在环境中。

youdao

On Tuesday, Chinese officials reported low levels of radioactive iodine-131 in areas of southeastern China.

VOA: special.2011.03.30

But people exposed to high levels of radioactive iodine can get thyroid cancer.

VOA: special.2011.03.30

The pills flood the thyroid gland with non-radioactive iodine.

VOA: special.2011.03.30

Radioactive iodine caused thousands of cases of thyroid cancer in children after the Chernobyl accident.

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And I was hit by the crossfire when someone threw radioactive iodine at someone else.

NPR: Confronting Misconceptions About Cancer Prevention

Radioactive iodine-131 and cesium-137 were also found in the drainage outlet of units 5 and 6.

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