科学家通过分析土壤中的植硅体来重建古代植被环境。

Scientists reconstruct ancient vegetation by analyzing ___phytoliths in the soil.

通过研究沉积物中的植物硅酸体，科学家重建了古代森林的气候条件。

Scientists reconstructed ancient forest climates by studying ___phytoliths in the sediment.