Heavy metals,such as lead,and products like insecticides have recently been linked to abormalities in newborns and attention deficits in toddlers.

VOA: standard.2010.08.09

So, this again, takes advantage of those great unique properties of transition metals, which we'll talk about in this course.

这同样也是利用了,过渡金属的独特性质，这个我们在以后的课程里也会讲到。

麻省理工公开课 - 化学原理课程节选

All the components that make up the coffee, and all the impurities, etcetera. cadmium, heavy metals, arsenic, whatever is in your coffee.

以及所有的杂质等等，钙，重金，砷，任何在你咖啡里的东西。

麻省理工公开课 - 热力学与动力学课程节选

So, if we're going to go to the moon, we're going to go to Mars,we want to be able to produce oxygen, structural metals and photovoltaic materials from in situ resources.

如果我们要去月球上，我们要去火星上，我们则必须要制造,氧气，结构金属和光电材料,就在原地制造。

麻省理工公开课 - 固态化学导论课程节选

It has two irons that are involved in doing the chemistry, so it includes transition metals.

反应中有两个铁原子参与,因此她还要了解过渡金属。

麻省理工公开课 - 化学原理课程节选

I'm interested in nonaqueous electrochemistry, so molten salts and polymers, the applied research. First of all, interested in environmentally sound technologies for extraction, refining, recycling of metals.

我对非水溶剂电化学感兴趣，还有熔盐和聚合物，以及应用性研究，首先，对环保型技术提取感兴趣,如金属的提取和精炼，以及循环回收。

麻省理工公开课 - 固态化学导论课程节选

And, in fact, this is the case for all the alkali metals.

事实上，所有的碱金属都有这样的性质。

麻省理工公开课 - 固态化学导论课程节选

And, we call these in simple English, metals.

而且，我们简洁地把它们称为金属。

麻省理工公开课 - 固态化学导论课程节选

So, the vast majority of elements in the periodic table are metals.

所以，元素周期表中的大部分,都属于金属。

麻省理工公开课 - 固态化学导论课程节选

And in the second half of this course, talk to us about transition metals in depth, and that's when we'll really delve into d orbitals.

在这个课程的后半部分，会深入的讲到，过渡金属，这时候，你们可以研究d轨道。

麻省理工公开课 - 化学原理课程节选