These may include bananas, which can contain a radioactive isotope called potassium-40, and brazil nuts, which can have radium levels over 1000 times what you might see in other foods.

其中可能包括香蕉（含有一种名为钾 40 的放射性同位素）和巴西坚果（其镭含量是其他食物中的 1000 倍以上）。