The XRD shows that the cobalt powder exists mostly in facecentered cubic (fcc) structure, a little in simple hexagonal.
测试结果表明多元醇还原的钴粉为球形，晶体结构以面心立方为主，还有微量的简单六方；
2
She kept her facecentered in the frame of the oval window and, holding her breath in delight, watched as everything she had known receded beneath her.
她的脸一直贴在椭圆形的窗框中间，欢快地屏住呼吸，看着她熟悉的一切在下方远去。
3
In earlier calculations, the initial configurations of the metallic clusters were often assumed as the fragments of bulk solids such as facecentered cubic (FCC) or body centered cubic (BCC).