English-Chinese/Many animals use signs and sounds to communicate with each other

Many animals use signs and sounds to communicate with each other. But humans have a complex system called language. It allows them to express ideas by using words.

许多动物使用动作和声音相互交流. 但是人类有一个叫做语言的复杂系统. 它允许他们通过使用词语来表达想法.