In the process of formation, the material must have received an environmental signal that reflects a change in climate and that can be deciphered by modern physical or chemical means.
在形成的过程中，材料必须接收到环境信号，反映气候变化，并能被现代物理或化学手段破译。
2
He was in a continual process of rewriting his material.
他一直在不断地改写他的材料。
《牛津词典》
3
This paper summarizes the latest research of fermenting process of yoghourt with plant raw materialin China.