61.   Potassium iodide does nothing to protect against any other radioactive isotope, let alone fend off the heat and blast effects of a nuclear explosion, the newspaper reported.

62.   The employees, including a pregnant woman, ate food and drank water in a lunchroom where NIH officials found traces of a radioactive isotope.

a. + isotope >>共 34
radioactive 53.91%
medical 10.43%
heavier 3.48%
chemical 1.74%
long-lived 1.74%
nonradioactive 1.74%
o 1.74%
short-lived 1.74%
stable 1.74%
electromagnetic 0.87%
radioactive + n. >>共 250
material 23.41%
waste 17.38%
substance 4.40%
isotope 2.97%
leak 2.97%
iodine 2.58%
element 2.35%
contamination 2.25%
dust 1.82%
fallout 1.77%
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