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Human - Wikipedia
human与human being的区别 - 柯帕斯英语网
Human being | Mental Health, Emotions & Behavior | Britannica
What is a human being? | Britannica - Encyclopedia Britannica
Homo sapiens | Meaning, Characteristics, & Evolution | Britannica
人類 - 维基百科,自由的百科全书
人类 - 维基百科,自由的百科全书
Human - Simple English Wikipedia, the free encyclopedia
Human Characteristics: What Does it Mean to be Human
What Makes Us Human? 11 Important Features - ThoughtCo