labile

adj.不安定的,易发生变化的

易变的；不稳定的；易受外界影响的。

形容词

1、Her moods are so labile that it's hard to know how she'll react.
她的情绪变化无常，很难预料她会有何反应。
2、The labile nature of the chemical compound makes it difficult to store.
这种化合物易变，很难储存。