The system errors in the experiment of measuring air specific heat ratio was analyzed and the experimental method for correction was presented.

分析了空气比热容比测定实验的系统误差，提供一种对“绝热膨胀过程”中由于不完全绝热而引起的系统误差进行修正的实验方法。

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The bigger the animal is, the lower its surface-to-volume ratio; for every ounce of body mass, there is proportionately less surface through which heat can escape.

动物体型越大，其体表体积比越低；躯体每增加一盎司的重量，所能散发热量的表面就成比例减少。

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And in practical terms, we can define the efficiency as the ratio of the heat in to the work out.

在实际中，我们定义，效率为热与功的比值。

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And in practical terms, we can define the efficiency as the ratio of the heat in to the work out.

在实际中，我们定义,效率为热与功的比值。

麻省理工公开课 - 热力学与动力学课程节选

The loss ratio (heat to light output) is less than 5%.

WSJ: Seoul Semiconductor's LED-Lighted Path

However, these modified celluloses require large amounts of petroleum-based additives such as plasticizers, which results in bioplastics with a low plant component ratio and poor durability, including heat resistance and water resistance.

ENGADGET: NEC builds a better bioplastic from plant stems and cashew nut shells