这种物质状态的变化是物理变化.

This change of state is a physical change.

这种状态的变化是物理变化。

Eg. This change of the state is a physical change.

木材变成桌子是物理变化还是化学变化？

Is this a chemical change or a physical change when wood becomes desks?

木材变成桌子是物理变化还是化学变化？

Is this a chemical change or a physical change when wood becomes desks？

当冰淇凌融化了，一个物理变化也发生了。

When ice cream melts, a physical change happens.

就物理变化来说,没有新的物质产生.

In the case of a physical change no new substance is formed.

总的来说，物理变化不产生新的物质。

Generally speaking , no new substances forms in a physical change.

当一种物质只改变状态或形式时, 就是物理变化.

When a substance changes only in state or in form, it is a physical change.

在 物理变化过程中，分子保持不变，没有新的 物质生成。

In a physical change the molecules remain the same, no new substance being found .

那些物理变化需要更多的能量，所以食物热加工可能是这些变化的助推器。

Those physical changes required more energy, and exposing food to fire may have provided that boost.