文献里这句是如何理解的？关于标晶面

面间距2.1、1.8和1.3埃的晶面分别被标定为Cu{111}、{200}和{220}，其中{111}面为惯习面。

是如何知道111为惯习面的，惯习面是暴露面的意思吗？

lz最好把文章贴上来，光靠你复制粘贴的一句话来判断，太牵强了

这三个面好像不共一个晶带轴吧

应助达人

根据e的模型 111不是在端面吗?

暴露面在这里可能就是Cu的惯习面
惯习面 应该指的是最密排面 FCC密排方向是<111> 密排面是{111}

这个是全文，麻烦大侠告诉我，如何理解这段话？
We further studied the structures of these Cu nanowires by high-resolution TEM. Figure 2 shows TEM and the corresponding high-resolution TEM images taken from the middle and end portions of two different Cu nanowires, respectively. The insets schematically illustrate the orientations of the Cu nanowires relative to the incident electron beam (indicated by arrows). The high-resolution TEM images clearly show the existence of {111} twin planes parallel to the long axis of the nanowire. When the direction of the e-beam was perpendicular to the bottom side of the pentagonal nanowire (Figure 2 b), two sets of fringes with lattice spacing of 2.1 nm and 1.3 nm were observed, corresponding to the {111} and {220} planes of Cu, respectively. Figure 2 d shows the high-resolution TEM image taken from a Cu nanowire oriented with one of its side faces parallel to the e-beam. The fringes with lattice spacing of 2.1, 1.8, and 1.3  could beindexed to the {111}, {200}, and {220} planes of Cu, respec-tively. Based on the results of both SEM and high-resolution TEM analyses, we can conclude that the Cu nanowires had a penta-twinned structure bound by ten {111} facets at the two ends and five {100} side faces, which are consistent with the results previously reported for other metals including Ag, Au,
and Pd. [21]

我贴了全文，麻烦再帮我看一下

我贴了原文，可以再帮我看一下吗？