Increasing Earth's reflectiveness can cool the planet.

提高地球的反射率可以给地球降温。

A roof or a wall with higher-than-normal reflectance will absorb less sunlight.

反射率高于正常值的屋顶或墙壁吸收的阳光较少。

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

它的表面其非常暗淡，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，研计算了熔岩在熔融状态和固态下的反射率。

If we put this material onto young, thin ice, we instantly make it more reflective.

如果我们把这种材料放在初形成的薄冰上，就能刻提高它的反射率。

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。

If we put just a few hairs widths onto young, thin ice, that isn't very reflective, we instantly make it more reflective.

如果我们在反射率不高的初形成薄冰上放几根头发丝宽的玻璃微球，就能刻提高它的反射率。

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白色，以改变其反射率，从而微调其轨道。

The results showed that the use of primary hyperspectral reflect ance is very feasible for such classification.

研结果表明，利用原始高光谱反射率进行此类分类是非常可行的。

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。

For the Shatangj u mandarin cultivar, a non-destructive citrus HLB field detection method based on hyperspectral reflectance is proposed in thi s study.

本研针对砂糖橘品种，提出了一种基于高光谱反射率的非破坏性柑橘黄龙病田间检测方法。

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。

On top of this the SR71 itself was armed with defensive countermeasures that included jammers, and the low radar-reflectivity only confounded problems for an incoming missile.

最重要的是， SR71 本身配备了包括干扰器在内的防御对策，低雷达反射率只会混淆来袭导弹的问题。

Se veral machine learning algorithms (logistic regression, decision tree, support vector machine, k-nearest neighbor, linear discri minant analysis, and ensemble learning) were used to discriminate between disease groups: healthy, symptomatic HLB-infecte d, and asymptomatic HLB-infected, based on leaf reflectance.

采用了多种机器学习算法（逻辑回归、决策树、支持向量机、K近邻、线性判别分析及集成学习），基于叶片反射率对疾病群体——健康、症状性黄龙病感染和无症状性黄龙病感染——进行区分。