雪的高反射率使阳光显得特别刺眼。

The high ___reflectivity of the snow made the sunlight appear particularly glaring.

积雪的高反射率有助于保持地面温度较低。

The high ___reflectivity of snow helps keep the ground temperature low.

他的演讲展现出非凡的深度思考能力，每个观点都经过仔细推敲。

His speech demonstrated remarkable ___reflectivity, with every point carefully considered.