英语翻译Do you think it humane to cage animals 写5,6句就行,单词不用太复杂.

Animals are our friends,We should not cage them.
I went to the zoo from time to time,whenever I came back from wathcing them in cages,I feel very bad.For example,I never heard the lion roar.They are our friends they shoudn't be caged only for our happiness.Although they are alive,but I konw they are not happy.We should let them out back to the nature.