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
This process is termed "replacement" because solutions have dissolved the original material and replaced it with an equal volume of the new substance.
这个过程被称为“置换”,因为溶液溶解了原来的物质,并用等量的新物质取而代之。
3
Collecting raw material, which is reading books and taking notes, is very much like the process of brainstorming at the prewriting stage of an ordinary essay.