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 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。
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