复数： radiations

Cigarette smoke and radiation also produce free radicals .

抽烟和辐射同样也产生自由基。

Treatment options for acoustic neuroma include regular monitoring , radiation and surgical removal .

听神经瘤的治疗包括定期检查、放射疗法和外科手术切除。

Everyone knows radiation has no known beneficial uses .

人人都知道放射物至今还没有益的用处。

The blue color here represents radiation pouring out from material very close to the black hole .

图中的蓝色部分表示从密度极高的黑洞中喷涌而出的辐射能。

But all radiation is not created equal .

但是辐射并不都是一样的。