求翻译：关于化学：把整本书的所有化学方程式抄一遍到本子上，有时间就写一写，要能相当熟练的写出他们，记住并熟悉那几个特殊的，同时知道每个化学反应的现象，包括颜色，气味，形态等的变化，还有就是记住化学物的颜色，状态，气味，比如哪些物质是固体，白色沉淀有哪些..是什么意思？

On chemical: to whole this book of all chemical formula copied a again to book Shang, has time on wrote a wrote, to can quite skilled of writes they, remember and familiar that several special of, while know each chemical reaction of phenomenon, including color, smell, form, of changes, also has is remember chemical property of color, State, smell, such as which substances is solid, white precipitation has which..