a conscious act of cruelty的用法和样例：
- A cold execution, a mindless act of cruelty!
- He was also a sadist who indulged in acts of cruelty.
- His name was stained with acts of cruelty.
- The excesses (ie acts of cruelty) committed by the occupying troops will never be forgotten.
- The man has a streak of cruelty in his character.