Human beings是复数形式，指代多个人或人类整体。 human being是单数形式，指代单个人或作为个体的人类。 语法上beings强调群体概念，being强调个体概念。 A man, woman, or child of the species homo sapiens (智人), distinguished from. Ergonomics (or human factors) is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies.
Utah County faces millions for Tyler Robinson murder defense costs
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