These are globules of once-molten rock trapped inside crystals in the rock.
这些源自熔岩的球状岩石被包裹在橄榄石晶体里。
2
NASA crashed an empty rock booster into the moon to see if water-ice crystals were at the South Pole.
NASA将一枚空岩助推器撞向月球，以探测在月球南极是否存在水冰晶体。
3
"The detached crystals slithered down the rock face for a moment and then made no further sound" (H. G. Wells). The word can also suggest the sinuous, gliding motion of a reptile.