radioactivity

名词

1. 1

   放射性

   Scientists measured the radioactivity of the soil near the old plant.

   科学家测量了旧厂房附近土壤的放射性。

2. 2

   放射线、辐射

   Radioactivity in the area has fallen to safe levels.

   该地区的放射线已降到安全范围。