Of concern in the current situation is ionizing radiation, which is produced by spontaneously decaying heavy isotopes, such as iodine 131 and cesium 137.

目前情况下值得忧虑的是电离辐射，它由重同位素——如碘131和铯137——自发衰变而生成。

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This type of surgery involves constantx-rays and can take a long time to complete, exposing the physician toharmful radiation and mandating that they wear a heavy protective vestwhile operating.

这类手术需要恒定的X光，并且需要耗费很长时间才能完成。 手术过程中放射出的X光会对医生造成有害辐射，在手术过程中必须要求医生穿上防护性背心。

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At Daiichi, at least two workers are missing and many other workers are risking heavy doses of radiation.

而在福岛Daiichi，至少有两名工作人员失踪，还有很多工作人员面临高剂量核辐射的风险。

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About half of children who go to the ER with head injuries get this radiation-heavy scan, and clinical observation first could help some who don't really need a CT avoid it.

NPR: Doc Groups Issue List Of Overused Tests, Therapies

Scientists have found creatures thriving in places that would poison or cook most life on earth--deep inside rock, under the ocean or in hot springs, places that are extremely salty, or acidic, or bathed in radiation or heavy metals.

FORBES

Honeywell began the MRAM effort in 1984 at the urging of the Department of Defense, which needed memory for satellites and long-range missiles that could withstand radiation in space without the addition of heavy shielding.

FORBES: Total Recall