英语语法分析

Here's what a naturally-occuring noctilucent cloud looks like, for comparison

以下可以对比自然形成的夜光云看起来来是怎样的

The clouds are also called noctilucent, or "night-shining," clouds because they are usually seen at twilight.

这些云也被称为“noctilucent”，也就是“夜光云”，因为他们一般出现在黄昏时分。

Captured by flickr user, breff 3. A rendering of the noctilucent clouds created from data obtained by Russel’s NASA project, AIM.

利用拉塞尔NASA项目获得的数据绘制的夜光云效果图。