... 什么是化学(What is Chemistry?) 化学变化的特征(The Characteristics of Chemical Change) 化学实验的重要性(The Importance of Chemical Experiments) ...
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通过室内模拟堆制和同位素交叉标记，研究了以稻草和禽畜粪为主体材料的堆肥制作过程中的生物化学变化特征。
Simulated composting was carried out to study the changes of biochemistry and chemical characteristics of the organic manure compost using labelled organic material and inorganic nitrogen fertilizer.
研究了热风与热泵结合干燥胡萝卜的显微结构和化学变化特征；
The microscopic structure and chemical changes of the thermal airflow and heat pump drying carrot were studied.
代谢是生命活动中所有(生物)化学变化的总称。代谢活动是生命活动的本质特征和物质基础。
Metabolism is the total (bio) chemical changes in living organisms and metabolic activities are the basic features of living systems.
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