a refinement of cruelty

• 极端的残忍

a refinement of cruelty的用法和样例：

例句

1. The cruelty of the slave traders knew no bounds.
   奴隶贩子的残忍是说不完的。
2. His cruelty marks him as a brute.
   他的残忍表明他是个人面兽心的家伙。