A BTU is the amount of heat energy needed to raise the temperature of about one-half kilogram of a substance by one degree Fahrenheit.

VOA: special.2010.11.23

All the energy that is inserted into this, which might be turbulence initially, becomes heat, or becomes -- it raises the temperature.

由振动引起的所有，进入系统的能量最后都变成了热，因此温度便升高了。

麻省理工公开课 - 热力学与动力学课程节选

All the energy that is inserted into this, which might be turbulence initially, becomes heat, or becomes -- it raises the temperature.

由振动引起的所有，进入系统的能量最后都变成了热，因此温度便升高了。

麻省理工公开课 - 热力学与动力学课程节选