radioactivity
英 [,re?d????k't?v?t?]
美[,red?o?k't?v?ti]
- n. 放射性；[核] 放射能力；[核] 放射現(xiàn)象
考試真題
- Frederic became one of her assistants, and Irene taught him the techniques required to work with radioactivity.
2017年12月四級(jí)真題（第一套）聽力 Section C
2017年12月四級(jí)真題（第一套）聽力 Section C