Even bananas contain trace amounts of a radioactive potassium isotope.

即使是香蕉都含有微量钾的放射性同位素。

The answer lies in a slightly obscure but ingenious field known as isotope geochemistry.

答案在于同位素地化学，这是个不大知名而奇妙的领域。

A radioactive isotope called tritium will remain in the waste water.

氚这种放射性同位素无法被清除。

Nitrogen fertilisers have altered the balance of chemical isotopes in peat bogs.

氮肥改变了泥炭沼泽中化学同位素的平衡。

It's possible some of the more exotic isotopes of oxygen came from the other planet.

有可这些稀有的同位素部来自另一个星。

This toxicity is related to what's called the kinetic isotope effect.

这种毒性与所谓的动力学同位素效应有关。

For one thing, there's more than one isotope — or form — of strontium.

一方面，锶的同位素或形式不止一种。

The researchers demonstrated the corn plants' talent by exposing them to labeled isotopes of nitrogen.

研究人员让玉米接触带标记的氮同位素，以此来证明。

I injected the stable isotope carbon-13 carbon dioxide gas.

我往他们的袋子中注射了 含有稳定性同位素碳13的二氧化碳。

Using radioactive isotopes, scientists discovered that trees share water and nutrients with others in need.

科学家利用放射性同位素，发现树木会享水和营养给他有需要的树。

A level of the hydrogen isotope called radioactive tritium will remain in the water.

一种被称为放射性氚的氢同位素会留在水中。

Johnson's team analyzed trace elements and carbon and oxygen isotopes in the hardened cave drippings.

约翰逊的团队析了硬化洞穴水滴中的微量元素和碳氧同位素。

Tritium is an isotope of what element? - Hydrogen.

氚是哪个元素的同位素 -氢。

They were injecting rats with radioactive isotopes and one of the techs got bit.

他们给老鼠注射了放射性同位素 但中的一名技术员被咬了。

I'm referring to the americium isotopes I was using to make a nuclear reactor.

我在说的是我当年想拿来制造核反应堆的镅同位素。

Did you secure the isotope from L-Corp?

你安置好L公司的同位素了吗？

The process involved studying the behaviors of different kinds of isotopes found in potassium and rubidium.

这个过程涉及研究在钾和铷中发现的不同同位素的性。

Some rocks from the Moon show a peculiar ratio of different kinds of oxygen atoms, called isotopes.

一些来自月的岩石含有特殊比例的氧原子同位素。

So the researchers also measured the proportions of different carbon and nitrogen isotopes in whiskers from coyotes.

因此，研究人员还测量了郊狼胡须中不同碳同位素和氮同位素的比例。

Denied. All right, for ten points, What is the lightest element on Earth, with no stable isotope?

驳回。接下来题，地上没有稳定同位素的最轻的物质是什么？