volcanic glass

基本解释

But in 2008, an analysis of a handful of lunar volcanic glass beads suggested they might have formed in a watery environment.
但是，在2008年，对少量月球火山玻璃碎屑的分析显示它们可能是在含水的环境中形成的。
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.
岩架上覆盖了厚厚的火山灰烬，其间点缀着火山玻璃珠和被称之为火山毛（Pele's hair）的熔岩细线。
In 2008, research of volcanic glass beads brought attention to the fact that there might be more water in the moon's interior than scientists had previously thought.
在2008年，对火山玻璃珠的研究向我们展现了一个事实：月球表面水含量比科学家先前想的多出许多。

Ultra-sharp scalpels used in delicate procedures like eye surgery are still crafted by hand from volcanic glass called obsidian.
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