"灰人"是个多义词，它可以指灰人（外星人种）,灰人（牛津词汇中最坏的诨名）,灰人（周国贤演唱歌曲）,灰色人。
但其实现代的不明飞行物研究者或多或少已经证实了灰人的存在。
But modern ufologists are more or less informed about the Grays already.
那里盖了一个“地精房子”，守卫是儿童图书《小灰人》里的角色、“英国最早的地精”多德尔的一个实际大小的塑像。
There is a gnome's house guarded by a lifesize statue of Dodder, the "oldest gnome in England" and a character in the children's book the Little Grey Men.
罗马人观察到，当火山灰与水混合然后冷却，火山灰变得非常坚硬，几乎不可能分解。
The Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up.
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