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。
Cooking food causes it to go through a chemical change.
烹调食物会使其发生化学变化。
During a chemical change, one kind of matter changes into another completely different kind of matter.
在化学变化中，一种物质变成另一种完全不同的物质。
If a change does not affect the food's chemical composition, we call it a physical change.
如果一种变化不影响食物的化学成分，那我们便称之为物理变化。
It's a state function, so we're at constant temperature and pressure, and now we want to consider some chemical change or a phase transition or you name it.
这就是态函数，我们处于恒定的温度和压强之下，然后考虑某些化学变化或者相变，或者你想考虑的东西。
When rust is formed, a chemical change has taken place.
当锈形成的时候，就发生了化学变化。
This is a chemical change, not a physical one.
这是一个化学变化，而不是物理变化。
Chemical change, especially decomposition, produced electrolyte by an electric current.
电解质是指电流在分解时所产生的化学变化。
General term for compounds or materials that slow down or stop an undesired chemical change such as corrosion oxidation or polymerization drying skinning mildew growth etc.
延缓或阻止不希望发生的化学变化的化合物或材料的通称，例如腐蚀、氧化或聚合、风干、油漆起皮、霉菌生长等现象。
Electricity can bring about chemical change.
电可以引起化学变化。
When two or more elements combine and form a compound, a chemical change takes place.
当两种或两种以上的元素化合形成化合物时，发生化学变化。
Thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change.
热塑性的材料能够不断的再熔化和再冷却而不需要经历任何可感知的化学变化。
Thee chemical change gives off heat and light.
这种化学变化发出热和光。
Researchers looked for - and found - a chemical change called DNA methylation in healthy tissue adjacent to breast tumors.
研究者寻找并发现了靠近肿瘤组织的健康组织中有“DNA甲基化”这种化学改变。
In a chemical change, energy is not created, nor is it destroyed.
在化学变化、能源是不创造，也就是摧毁。
A chemical change is one in which the structure of particles is changed and a new substance is formed.
化学变化是一种改变粒子结构、形成新物质的一种变化。
The chemical change takes place in paper when it burns.
纸燃烧时会产生化学变化。
Nuclear reaction is a chemical change or a physical one?
核反应是化学反应还是物理反应。
This scientific law tells us that when one form of energy is converted to another form in any physical or chemical change, energy input always equals energy output.
这科学法律告诉我们，当一个能量的形式被转换成在所有物理或化学变化时的另一个形式，能量输入总是合计能量产品。
This chemical change can be expressed by an equation.
我们可用反应式表示这种化学变化。
This paper introduces the physical and chemical change of particleboard in the course of hot pressing and analyses the effect of temperature, heating time and pressure.
介绍了刨花板热压过程中板坯的物理变化和化学变化，分析了热压温度、时间、压力在热压过程中的作用，阐明了热压工艺是刨花板生产中产品质量保证的重要环节。
Due to its 'atomic resolution, STM can be used to induce the nanoscale physical or chemical change on the surface.
STM由于其原子级的空间分辨能力，可以诱导表面发生高度局域化的物理或化学变化。
When a chemical change takes place, one or more substances are formed.
当化学变化发生时，就形成了一种或多种物质。
Weary is one kind of toxicant phenomenon which in the cell the chemical change derivation causes.
疲劳是细胞内化学变化衍生导致的一种中毒现象。
The main chemical change in the culture phase is that the protein was degradated into water_solubility protein partly.
培菌阶段发生的主要化学变化是蛋白质部分降解成为水溶性蛋白质。
When matter is changed to a substance different from what it was , the change is a chemical change .
当物质变成与其原来不一样的另一物质时，这种变化是化学变化。
A powder coating designed to undergo an irreversible chemical change during heating and will not revert to the liquid stage when reheated.
受热后发生不可逆化学反应，当再次受热不会成为液态的粉末涂料。
A powder coating designed to undergo an irreversible chemical change during heating and will not revert to the liquid stage when reheated.
受热后发生不可逆化学反应，当再次受热不会成为液态的粉末涂料。
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