Stability can be defined as simply lack of change.

　　穩定性可以被定義為只是缺乏變化。

　　The question of ecosystem stability is complicated.

　　生態系統穩定性的問題是復雜的。

　　In general, diversity, by itself, does not ensure stability.

　　一般來說，多樣性本身并不能保證穩定性。