The flow of heat into the ground by day and from the ground at night.

白天到达地面，晚上由地面发散的热量流量。

Any cracks will alter the flow of heat, and these changes can be picked up with a heat-sensitive camera.

通过一台热敏感摄像机就能够捕捉到飞机上的裂痕，因为这些裂痕会改变热流的方向。

Vehicles used to transport perishable food products should be well insulated to retard the flow of heat through their walls.

用于运送易腐食品的车辆一般都要有很好的隔热效果，从而减缓通过车身进行热传导。

A new method and its theory used for on-line measurement of surface total heat flow of heat equipment are presented in this paper.

本文提出一种在线测量热设备表面全热流的新方法相该方法的理论。

Introduce the main technical features and process flow of heat-cycle urea process. Also put forward some Suggestions for the expansion of heat-cycle urea plant.

该文介绍了热循环尿素工艺的主要技术特点及工艺流程，并就该工艺的特点对水溶液全循环法尿素生产装置的增产节能改造提出了参考意见。