好处：包裹加州卷的海苔含有各种必需营养素，如碘，硒，钙，w-3脂肪酸。
The upside: The seaweed it\\\'s wrapped in contains essential nutrients, such as iodine, selenium, calcium, and omega-3 fats.
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。
Of concern in the current situation is ionizing radiation, which is produced by spontaneously decaying heavy isotopes, such as iodine 131 and cesium 137.
这些化学物质中的一些对人类极其危险，因为它们酷似人体天然所需的物质(如碘)，并极易进入人体的组织。
Some of these chemicals are especially dangerous to humans because they mimic substances the body naturally USES, such as iodine, and are readily incorporated into the body's tissues.
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