这种玻璃处于亚稳态，轻微的冲击就可能导致它突然破碎。

The glass was in a ___metastable state, and a slight impact could cause it to shatter suddenly.

这种材料在室温下能保持亚稳态数小时，之后才开始分解。

The material remained in a ___metastable state for hours at room temperature before decomposing.