句子里面的“clay”是什么意思?“Certain men were very clever at measuring the time of clay according to the beating of their own hearts.”这里面的“clay”是什么意思?

句子里面的“clay”是什么意思?“Certain men were very clever at measuring the time of clay according to the beating of their own hearts.”这里面的“clay”是什么意思? clay是什么意思 clay是什么意思?急! clay animation是什么意思 clay mask是什么意思 计算器里面的CE和C是什么意思 terracotta-clay是什么意思?在一篇西安的文章看的 英文 clay and plant 是什么意思 clay clay clay clay clay clay clay clay 里面的CE是什么 baked clay是什么意思?工程设学词汇