background radiation造句

1、These levels of natural and background radiation is normal.
但这些都只是正常辐射。

2、But natural background radiation is more than 100, 000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。

3、But natural background radiation is more than 100,000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。

4、Cosmic X-Ray Background Radiation and Active Galactic Nuclei
宇宙X射线背景辐射与活动星系核

background radiation翻译