词典释义：
释义
adj.
not securely held or in position; dangerously likely to fall or collapse
不牢靠的，不稳的；易倒塌的
-
a precarious ladder .一个不牢靠的梯子。
dependent on chance; uncertain
碰机会的；不确定的
-
she made a precarious living by writing .她靠写作过着饔飧不继的日子。
词源
"mid 17th cent.: from Latin
