adj.不能持续的;无法维持的;
例句:
But the way energy is used currently is unsustainable.
但是目前能源使用的方式是不可持续的.
There are structural problems in China's economy which cause unsteady, unbalanced, uncoordinated and unsustainable development.
中国经济存在着不稳定 、 不平衡 、 不协调、不可持续的结构性问题.
No one denies that we are an unsustainable path.
人人都知道我们正处在一条不可再持续的道路上.