naturally occurring isotope meaning in Chinese

自然界存在的同位素

Polonium - 210 , a naturally occurring isotope of polonium , is found in all environmental media , such as in soil , air and even in human body , at very small amounts
钋210是钋元素的一个同位素，在所有自然环境中，例如泥土大气以至人体都可以找到极少量钋210 。
Radioactive matter is incorporated into plants , which are then eaten by animals with the result that most foodstuffs have a measurable amount of radioactivity . additional radioactivity in food comes from the naturally occurring isotope carbon 14 . some cosmic radiation also reaches sea level
植物亦混有辐射物质，而动物吃掉植物，以致绝大部份食物也含有一定辐射食物辐射也来自天然的同位素碳十四，此外，宇宙辐射亦可穿越大气层照射到海面。