The polarization property of material point of solid phase has some similarities with the polarization of Rayleigh Wave in free surface of uniform elastic solid;
固相质点的偏振特性与均匀弹性固体自由界面上的瑞利波的偏振有某些类似之处；
Other indicators, such as sales of roofing material, point to busier economic activity.
其他的指标，例如屋顶建材的销售，也指向更繁忙的经济活动。
Other indicators, such as sales of roofing material, point to busier economic activity.
其他的指标，例如屋顶建材的销售，也指向更繁忙的经济活动。
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