While 38 degrees seems like a big distance (it is around 80 times larger than the size of the moon), the Large Area Telescope on Fermi sees a huge fraction of the sky at once.
尽管38度似乎是一个很远的距离（月亮大小的80倍左右），费米航天器上的大范围望远镜却可以一次观察到特别大的一部分天空。
The tensile fracture of 3j21 alloy is a dimple fracture at peak-aged state. The distance between the slip lines is larger in the microstructure near the fracture of the alloy at under-aged state.
峰时效态3J 21合金的拉伸断口为韧窝断口，断口附近显微组织中滑移线之间的距离大。
The tensile fracture of 3j21 alloy is a dimple fracture at peak-aged state. The distance between the slip lines is larger in the microstructure near the fracture of the alloy at under-aged state.
峰时效态3J 21合金的拉伸断口为韧窝断口，断口附近显微组织中滑移线之间的距离大。
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