Its surface is actually pretty dark, with about the same reflectivity as a chalkboard or asphalt.

它的表面其实非常暗淡，只有大约相当于黑板或者沥青的反射率。

After producing the lava, the researchers calculated its reflectivity in both the molten and solid states.

制造出熔岩之后，研究人员计算了熔岩在熔融状态和固态下的反射率。

Black carbon deposited on the Arctic snow and ice, he says, will have only a minimal effect on its reflectivity.

他说，落到北极冰雪上面的黑炭，只会对其反射率带来微小的影响。

You can't do something like paint one side of the asteroid white and cause its reflectivity to change, which nudges the orbit.

你不能像某些理论那样，把小行星的一侧涂成色，以改变其反射率，从而微调其轨道。

By restoring Arctic ice reflectivity, we could gain another 15 years that we sorely need to make the transition to sustainable fuels and energy.

通过恢复北极冰层的反射率，我们可以再赢得 15 年的时间，而这正是我们向可持续燃料和能源过渡迫切需要的时间。

What is the place of autonomous regard in reflectivity and long-term thinking about future relations with others and with the land?

自主尊重在反思性和长期思考未来与他人及土地的关系中扮演什么角色？

We just happen to have this other thing of reflectivity to help to work things out, to have society and to have culture.

我们恰有这种反射能力来帮助解决问题，建立社会和文化。

The galvo mirrors are moving relatively quickly, but they may need to be slowed down a bit, depending on the reflectivity of the material in order to ablate it.

电流镜的移动相对较快，但它们可能需要慢一点，这取决于烧蚀它所需的材料的反射率。

The question I ask myself, basically, for the future of my kids, when I realised that this was a problem, is there a safe way to rebuild that reflectivity?

当我意识到这是个问题时，我问自己的问题是，为了我孩子的未来，有没有一种安全的方法来重建这种反射性？

This means insulating the embankments of roads by increasing their sickness and also increasing the reflectivity of paved surfaces to minimize the amount of solar radiation absorbed.

这意味着通过增加路基的厚度来隔热，并提高铺装表面的反射率，以减少吸收的太阳辐射量。

So we're not just beings in the world, like all the other flora and fauna and so on, but because we've got reflectivity, That's the easier way of describing our worldview.

所以我们不仅仅是世界上的生物，像所有的植物和动物等等，而是因为我们有反思能力，这就是更简单的方式来描述我们的世界观。

It is recommended to use sunscreen daily, but you should pay special attention before prolonged sun exposure or when at the beach or among snow since the reflectivity of water and ice amplifies the Sun's rays.

建议每天都使用防晒霜，还要特别注意：在长时间的阳光曝晒之前，或是待在海边、在雪地中时，都要涂上防晒霜，因为水和冰也会反射太阳辐射光。