她身体纤弱，而且心理也不稳定。

She was physically delicate and psychologically unstable.

《柯林斯英汉双解大词典》

即使天气好的时候，食盐供应也不稳定。

Even in fair weather, however, supplies can be unstable.

youdao

由于这种鱼很难监测到，所以对它们数量的估计也不稳定。

They are also very tough to monitor, so population estimates are wobbly.

youdao

uncertainty of the food supply and the like.

而且食物供给也不稳定

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选