adj. 不稳定的；动荡的；易变的
unstable state不稳定状态；非稳态
unstable slope不稳定斜坡，不稳定边坡；不稳坡
1.To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop.
举个极端的例子，以单一作物为主的农田是如此不稳定，一年的坏天气或单一害虫的入侵可以摧毁整个作物。
2.The energy absorbed by the chlorophyll molecules of the unstable autumn leaf is not immediately channelled into useful products and processes, as it would be in an intact summer leaf.
不稳定的秋叶叶绿素分子吸收的能量，不会像在完好的夏叶中吸收的能量那样立即传输到有用的产品和工艺流程中去。
3.Five is unstable, one is too hard.
五个人不稳定，一个人太难。
4.The situation was unstable.
局势不稳。
5.In the unstable Middle East, Israel is the one anchor of stability.
在不稳定的中东，以色列就是稳定的支柱。
6.So evanescent and unstable are men's works in this world!
在这个世界上，人的工作是这样的短暂和不稳定！
7.He was emotionally unstable.
他情绪多变。
8.The bed is rickety [unstable].
这床不牢。