Gravel strata is a kind of typical instable layer in drilling engineering.卵砾石地层是钻探工程中常见的一种典型的不稳定地层.The instable voltage of grid shortens the service life of street lamps.电网供电电压不稳定,致使路灯的使用寿命缩短.Our budget shrunk because of...

adj.不牢固的，不稳定的...

instable的音标：instable的英式发音音标为：[ɪn'steɪbl]instable的美式发音音标为：[ɪn'steɪbəl]...