youdao

The 67 tests conducted in the northern Marshalls between 1946 and 1958 released radioactive iodine said to be 150 times worse than the contamination from the nuclear disaster at Chernobyl in 1986.

1946年到1958年，在马绍尔群岛北部进行了67次核试验，释放出的放射性碘造成的污染据说比1986年切尔诺贝利核灾难带来的污染严重150倍。

youdao

Sources of this include the medical use of radioactive materials, fallout and contamination from nuclear industry, and the storage and dumping of radioactive waste.

辐射源包括医用放射性材料、核工业的放射性沉降物和污染物，以及辐射废弃物的积存和倾倒。

youdao

To date,there has been no evidence of contamination in the river from the oil spill.

VOA: standard.2010.05.08

Cesium remains the most widely dispersed isotope while concerns remain over long-term contamination from strontium and plutonium.

CNN: Chernobyl: Environmental dead zone or eco-haven?

And what prevents soil and surface water contamination from countless units that ultimately wind up in landfills?

FORBES: How Many Politicians Are Needed To Screw Up A Light Bulb?

Woodland burials are currently not allowed in Jersey, due to fears of contamination from metal contained in people's bodies.

BBC: Jersey minister proposes freeze drying dead bodies