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。

youdao

As the US dollar was still so unstable, buyers were holding back.

由于美元仍然不稳定，买主都踌躇不前。

youdao

All right, so I refused to risk my life last fall to put up that particular storm window because the borrowed ladder was so unstable.

好吧，那么我是不会冒着摔下来的危险爬上那单独的老虎窗的，因为那架借来的梯子时如此的不稳固。

youdao

And so He2 unstable.

因此He2，不稳定。

麻省理工公开课 - 固态化学导论课程节选

Second, that orbit looks so unstable that he thinks it unlikely that it could have lasted for the 4.5 billion-year history of the solar system.

ECONOMIST: X marks the spot

Yet 1969 is three decades ago, and it should be a source of dismay if this country, which is far more modern, developed and prosperous than Indonesia, remains so unstable that opposition rallies are considered fearsome threats to security and that one year of economic downturn releases unbearable tensions.

ECONOMIST: The shaming of Malaysia

When they assess the accuser's credibility, they may ask whether she is so mentally unstable as to have fabricated or imagined the events she alleges?

CNN: Can Kobe Bryant be convicted on 'he said/she said' evidence alone?