Radioactive cesium has also been detected, but at lower activity concentrations.

此外还发现了放射性铯，但放射性浓度较低。

youdao

Residential houses are important places of human activity, and radioactive pollution of housing environment has been attracting more and more attention.

居室是人类活动的重要场所，居室环境的放射性危害越来越受到关注。

youdao

A radioactive isotope of cobalt with mass number '0 and exceptionally intense gamma-ray activity, used in radiotherapy, metallurgy, and materials testing.

钴的一种放射性同位素，质子数' 0，具有异常强烈的伽马射线作用，用于放射疗法、冶金和材料测试。

youdao

They combined conventional PET imaging, which requires a radioactive tracer to highlight the brain's metabolic activity, with other recent advances in the genetic engineering of brain cells that allows them to target specific brain circuits in lab animals.

WSJ: Brain Science: Mysterious Neural Circuitry Becomes Viewable