查询词典 chemical change

This is a chemical change, not a physical one.

这是一个化学变化，而不是物理变化。

A chemical change is one in which the structure of particles is changed and new substance is formed.

化学变化是其内有粒子结构变化和有新的物质生成的一种变化。

In the case of a chemical change, some new substance is produced.

就化学变化而言，它会产生新的物质。

A chemical change is one in which the structure of particles is changed and a new substance is formed.

化学 是改变粒子结构、形成新物质的一种。

We saw that a chemical change had taken place.

我们看到已发生了化学变化。

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。

When matter change to a substance different from what it was, the change is a chemical change.

当物质变成和原来不同的物质时，这种变化是化学变化。

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。

The principle of chemical equilibrium is of universal guiding signficance for the limitation of chemical change and the realization of direction and of material transformation favorable to man.

化学平衡原理对研究化学变化进行的方向和限度，实现有利于人类的物质和能量转化，具有普遍的指导意义。

This article analyses some basic conceptions that are comparatively vayue or even wrong wrong in the teaching of middle school chemistry, like the definition of chemical change, the influence of concentration on a chemical reaction , the structure of oxacid,and the acidity of sulfuric acid, the acidity of carbonic acid, and the conversion of allotropic substance.

分析了中学化学教学中的几个比较模糊甚至错误的基本概念，如化学变化、浓度对化学反应速度的影响、含氧酸的结构、硫酸的酸性、碳酸的酸性、热化学方程式的表示法、同素异形体间的转化等，并从大学化学角度加以澄清，以便使大一学生更准确地理解和掌握这些基本概念。

I'll try to bring the conversation around to the subject of money.

我想把谈话引到钱的问题上。

Only from a superior source of goats can an exceptional chevon product be made.

羊源 有优良的羊源才能生产出好品质的羊肉。