Depending upon the will or pleasure of another, or upon a turn of circumstances; uncertain; insecure.

随他人之意的；依赖于环境的；不确定的；不稳的。

Risky; dangerous.

危险的；不安全的。

Precarious implies an uncertainty dependent on the will of others, dangers, or the unknown.

Precarious 指因他人之意志，或因危险或因不可知之数而不能确定者。

Changes in political power made his position precarious.

政权变更使他的地位不稳。

Uncertain describes that which is not definite, fixed, and sure.

Uncertain 指不确定、不固定、不稳当之事物：