temperature contrast的用法和样例：
例句
- The approximation of a linear dependency between heat flow and temperature difference leads to satisfactory results.
在热流量与温度差之间，近似地采用线性关系，也能得出令人满意的结果。 - Further qualifications require that the two fluids be miscible and that the density difference be a function of differences in temperature.
另外的条件要求两种流体可以掺混起来，并要求两种流体的密度差是温度差。
