Some food items, beef steak for instance, come pre-sterilised with ionising radiation, which helps prevent spoilage.

有些食品，例如牛排，是事先经过电离辐射消毒的，这么做有助于防止食物变质。

These days, however, the main source of ionising radiation for most people is neither fallout from bombs nor radiotherapy; it is dental X-rays.

然而，现今影响大多数人的离子辐射的主要源头既不是原子弹的辐射尘埃也不是放射疗法，而是牙科X光。

The invisible magnetosphere shields us from the dangerous ionising radiation of space.

看不见的磁层保护我们免受危险的太空电离辐射。

Ironically, because past research studying the after-effects of exposure to things like atom bombs and radiation treatments for cancer suggests the most important environmental risk factor for meningiomas is ionising radiation.

讽刺的是，对人体暴露于类似原子弹辐射和癌症放射疗法后续影响的研究显示，产生脑膜瘤的最主要的环境风险因素是离子辐射。

Irradiated foods: meat and dairy produce have ionising radiation applied to them before packaging.

辐照食品：肉类和奶制品在包装前会进行电离辐射处理。

Another big problem is that space is brimming with ionising radiation that rips DNA to shreds.

另一个大问题是太空充满了电离辐射，将 DNA 撕成碎片。