Clay is a plastic substance.

黏土是可塑物质。

《牛津词典》

A coking gas oil was treated by clay refining processs in laboratory. Then the oil reacted with a substance a.

以物质A为反应物，白土为脱色物质，研究用反应-吸附的方法提高焦化柴油的质量。

youdao

Organic substance and physical clay of soil are important basis for index division.

其中，土壤有机质和物理性粘粒是重要的指标划分依据。

youdao

Since then, hives have been made out of practically every substance imaginable, including clay, stone, logs, bark, wicker, cork, and bamboo.

NEWYORKER: Stung