chemical change

In recent years, the climatic change, energy dissipation, the biological multiplicity reduced, chemical contamination, the urbanization confusion and polar ozone layer cavity phenomenon and so on have been unprecedentedly intensified. They had become enormous hidden danger of the human development.

近年来，气候变化、能源浪费、生物的多样性减少、化学污染、城市化混乱、极地臭氧层空洞等现象的空前加剧已成为人类发展的巨大隐患。

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Microorganisms are the agents that bring about the chemical change.

微生物是引起化学变化的作用者.

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A change is not a chemical change unless it results in forming a new substance.

一种变化要是不导致生成新物质，就不是化学变化。

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In a chemical change, energy is not created& nor is it destroyed.

在化学变化中能量既不能产生，也不会消灭。

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A chemical change takes place in paper when it burns.

纸燃烧时就发生了化学变化.

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The chemical change takes place in paper when it burns.

纸燃烧时会产生化学变化。

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Interesting, and most easily measured, is a chemical change in ground water before a quake.

有趣、也最容易测量的，是地震前地下水发生的化学变化。

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Thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change.

热塑性材料能够不断的再熔化和再冷却而不需要经历任何可测量的化学变化.

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Borax can not change the kinetics disciplines, but adding Borax can raise the effective diffusion coefficient of gas and apparent rate constant of chemical reaction.

硼砂不改变上述动力学规律，但添加硼砂提高了气体有效扩散系数和化学反应表观速率常数。

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When rust is formed, a chemical change has taken place.

当锈生成时, 就发生了化学变化.

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Any change that results in forming a new substance is a chemical change.

导致一种新物质生成的任何变化是化学变化。

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A chemical change takes place in any substance when it burns.

物质燃烧时产生化学变化.

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This chemical change can be expressed by an equation.

我们可用反应式表示这种化学变化.

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Whenever a chemical change takes place, There is a new substance formed.

每当发生化学变化时, 就有一种新的物质生成.

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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结合形成化合物时，发生化学变化。

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A chemical change has to take place before the energy can be let loose.

能量释放，必须有化学变化。

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Based on principle of chemical kinetics and aerodynamics, a simplified mathematical model for methane explosion is established. Change of system temperature and midterm factors are studied in the transition process from deflagration to detonation.

利用化学动力学及流体力学原理，建立了沼气爆炸状态参数计算模型，用于计算在巷道内沼气爆燃向爆轰转变过程（DDT）中，系统温度和连锁反应自由基的变化情况。

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Whenever a chemical change takes place, there is a new conference to formed.

每当发生化学变化，就有一种新的物质生成。

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The chemical change gives off [ out ] heat and light.

这类化学变化发出 热乎 光.

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A Novel Fiber optic Chemical Sensor Based on Change of Sample Refractive Index

一种新的基于折射率变化的光纤化学传感器

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Heat and light can be given off by this chemical change.

这种化学反应能放出热和光.

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We saw that a chemical change had taken place.

我们看到已发生了化学变化.

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The chemical change absorbing heat is named an end – thermal reaction.

吸收热量的化学反应被称为吸热反应.

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New material can be brought about through chemical change.

通过变化可以生成新的物质.

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The Chemical Change in Crosslinking Process of JR-ⅱ Emulsion by the Investigation of infrared Spectrometry

红外光谱法研究JR－Ⅱ型乳状液交联过程中的化学变化

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Magnetic Field Can Cause Chemical Change

磁场能引起化学变化

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A chemical change always results in forming at least on new substance.

一种化学变化总是产生至少一种新物质.

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The chemical change off heat and light.

这种化学变化发出热和光.

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Coal was formed out of dead forests by a long process of chemical change.

煤是由死去森林经过长期而缓慢的化学变化形成的。

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Wherever a chemical change takes place , there is a new substance formed.

每当发生化学反应, 都会产生新物质.

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