A new method of completing the square with reverse order is presented by change quadric form into standard form.

提出了一种新的将二次型化为标准型的配方法——逆序配方法。

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In actual state, the change of the embedded point and the characteristic of the reverse catenary are taken into account. This paper will propose the concept of effective length of the drag line.

实际状态下，考虑嵌入点的变化和嵌入缆的反悬链特性，提出了拖曳缆有效缆长的概念。

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According to the Law of Conservation of Energy heat equivalent to that which is required to change a solid into liquid must be given out when the reverse change takes place.

根据能量守恒定律，液体变为固体时放-出的热量必定等于该固体变为液体时所需的热量。

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