一种化学元素

Any of the chemical elements fluorine or chlorine or bromine or iodine or astatine.

氟、氯、溴、碘、砹中任意一种化学元素。

It is the discovery of a new chemical element.

它是一种新化学元素的发现。

Scientists have been able to create a chemical element that can fight cancer cells.

科学家们已经研制出一种可以杀死癌症细胞的化学元素。

The mixture of the two kinds of chemical elements creates a new element.

这两种化学元素混合在一起会产生一种新的元素。

Mercury is a kind of chemical element.

水银是一种化学元素。

Oxygen is a colorless,taseteless,odourless,gaseous chemical element.

氧气是一种无色，无味、无臭的气体状的化学元素。

" Noble gas:Any of the six chemical elements that make up the rightmost group of the periodic table as usually arranged: helium, neon, argon , krypton, xenon, and radon."

稀有气体：通常排列在周期律中最右边一族的六种化学元素：氦、氖、氩、氪、氙和氡。

An element such as carbon has several allotropic forms.

一种化学元素具有几种同素异形体，比如碳元素。

New government research shows that tomatoes should not be considered our only major source of lycopene, the phytochemical that could help prevent certain cancers and other health problems.

新的政府调查表明西红柿可能不是能够提供番茄红素（一种能够帮助抵御癌症以及其他生理疾病的植物化学元素）的唯一来源。

Lead is a chemical which causes cancer.

铅是能引发癌症的一种化学元素。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。