unstable

/ənˈsteɪbəl/

lacking stability or fixity or firmness

中文释义：不稳定的；不稳固的；易变的

The political situation in the region remains unstable, causing concern among investors.

该地区的政治局势仍然不稳定，引起投资者的担忧。

The patient's condition is unstable, so the doctors are monitoring him closely.

病人的情况不稳定，因此医生正在密切监测他。