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能量守恒定律以前大家都叫它做能量不滅定律,现在物理名词审查会认为守恒两个字比不滅要妥当些,所以我现在就用了守恒。有人说,这个定律应该叫做能量转换定律,因为能量可以由一种形式换为另一种形式。这个说法也很有道理,不过转换的定律就是守恒,如果仅仅说转换而不说守恒,还是不完全的。假如说成能量转换守恒定律,当然是比较完全些,但是似乎又太麻烦了一点。在讲到能量守恒定律的时候,总是要讲到能量转换的,我们觉得为简单起见,只要提出这个定律里面最重要的一个转换性质“守恒”就够了。
The law of conservation of energy We used to call it the law of invariance of energy. Now that the review of physical terms holds that conserving two words is more appropriate than invariance, I now use conservation. Some people say that this law should be called the law of energy conversion, because the energy can be changed from one form to another form. This argument is also very reasonable, but the law of conversion is conservation, if only to say that the conversion without saying that conservation, or incomplete. If we say that the law of conservation of energy conversion, of course, is more complete, but it seems too much trouble. When it comes to the law of conservation of energy, we always talk about energy conversion, and we think for simplicity it suffices to say that the most important transformational nature of conservation in the law is enough.