first law of thermodynamics

The first law of thermodynamics states that energy can neither be created nor destroyed.

热力学第一定律说明,能量既不能被创造,也不能被破坏.

The data model of the material and energy system is established based on the mass balance and the first law of thermodynamics. The material and energy balance of various systems is analyzed.

以物料守恒和热力学第一定律为基础，建立了各系统的物质能量系统数据模型，分析了各个系统内物料及能量的平衡状况。

We reformulate the first law of thermodynamics in terms of quantum-mechanical operators on the parameter manifold.

我们用量子力学的语言重新解读了热力学第一定律。

On the basis of the zeroth and first law of thermodynamics, the existence of absolute temperature and entropy function has been proved, and the basic equation of thermodynamics of reversible processes has been derived;

本文从热力学第零定律和第一定律出发，证明了绝对温度和熵函数的存在性，导出可逆过程的热力学基本方程。

According to the first law of thermodynamics, LNG releases a great quantity of cold energy during gasification.

由热力学第一定律可知，LNG气化时必然会释放大量的冷能。

The idea that energy is conserved is the first law of thermodynamics.

能量守恒这一概念是热力学的第一定律.