Infiltration heat from warm outside air through small holes, cracks, and door seals.

由外部通过小孔、裂缝和门的密封圈而进入的渗入热。

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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。

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Welding CCT diagrams of steels are the basic to select welding material, determine the optimum welding technology, relieve welding cracks and lay down standard of past heat treatment.

钢的焊接CCT图，是正确选择焊接材料、确定最佳焊接工艺、消除焊接裂纹、制订焊后热处理规范的重要依据。

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The pitch remained in excellent order, with no signs of the numerous cracks widening, but England have much hard work ahead in the heat to avoid possible embarrassment.

BBC: England on back foot against Bangladesh in Mirpur