heat difference meaning in English

温差

6 , the formation of nano - nano sic / al2o3 composite ceramic coating : the heating difference of the powder in - outer layer during spraying results in that the inner nanoparticles are only partially melted , without growing into larger grain , a lot of nanoparticle agglomerates with sintered shape were detected in the coating
6 、纳米?纳米sic al _ 2o _ 3复相陶瓷涂层形成过程为：干粉颗粒内外层在喷涂过程中受热历史不同，导致内层纳米粒子仅仅熔化而没有结晶长大，涂层中形成了许多呈烧结形态纳米粒子构成的团聚体。
Since then , the technology has evolved from bulky devices that amplify light about 1 , 000 times to compact equipment that can amplify any light source including faint starlight up to 50 , 000 times , and eyewear that allows soldiers to see in complete darkness such as in caves by detecting heat differences
这项技术发展至今，已经由当初仅可以将光源增强1000倍的大型仪器改进成为现在可将任何光源包括微弱的星光增强5万倍的小巧的精密仪器了。戴上可以感应热量的夜视目镜，士兵们即使在完全黑暗的环境里例如山洞里也可以将周围的物体看得清清楚楚。