English-Chinese/Intelligence is not limited to humans

Intelligence is not limited to humans. Many animals also show signs of intelligence: Animals also need to solve problems, and remembering how a problem is solved is useful to them.

智力不仅限于人类. 许多动物也表现出智力的迹象：动物也需要解决问题，并且记住问题如何解决对他们有用.