a sinister face的用法和样例：
- A sinister smile crept over his face.
- She had a sinister foreboding that the plane would crash.
- He was a sinister and crafty speculator.
- His eyes narrowed and took on a sinister cast.
- The ragged scar on his face lent him a sinister look.
- He actually saw that Jean Valjean, that sinister face, before him.