cruel

/kruəl/

(of persons or their actions) able or disposed to inflict pain or suffering

中文释义：残忍的；残酷的

Animal testing is often criticized as being cruel and unnecessary.

动物实验常被批评为残忍且不必要。

It is cruel to keep wild animals in small cages for entertainment.

为了娱乐将野生动物关在小笼子里是残忍的。