basics

US /ˈbeɪ.sɪks/
UK /ˈbeɪ.sɪks/
1.

những điều cơ bản

the essential facts or principles of a subject or skill.

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learning the basics of the business
:
fundamentalsessentialsrudimentsprinciplesfirst principlesfoundationspreliminariesgroundworkessencebasiscorekernelnubmarrowmeatcruxbedrockfactspracticalitiesrealitiessine qua nonnitty-grittynuts and boltsABC
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basicbasicallyback to basics