After More burial and chemicaltransformation of the aging organic material, the peat becomes lignite, a very soft coal-like material.
当这些古老的有机物质经过进一步的埋藏和化学变化，泥炭就变成一种非常软的，像煤物质那样的褐煤。
2
Beyond the bubbling syntheses that make the chemical products we all rely on, a different sort of chemicaltransformation is now taking place.
除了我们日常生活中赖以为生的合成化工产品，一种不同的化学技术改造正在异军突起。
3
The law of conservation and transformation of energy is the chief basis of physical, astronomical and chemical reasoning as well as of engineering practice.