The unnamed enthusiast brought radioactive materials, as well as a Geiger counter which he ordered from the United States.
这为匿名核能爱好者自备一堆放射性原材料，还有一个盖格辐射剂量仪，这些东西都是他从美国订购的。
2
Tooby recalled, while still a student, using a Geiger counter to show a custodian that his household Chinaware was more radioactive than other objects nearby.