不稳的

The peace treaty rests on shaky foundations.

这项平条约建于不稳固的基础上。

Wobbler disease (cervical instability) is a condition of the cervical vertebrae that causes an unsteady gait and weakness in dogs.

摇摆病（颈椎不稳）是颈椎病变引起的步态不稳虚弱。