basic

/ˈbeɪsɪk/📚 1147 87 4四级考研托福雅思中考高考
You use basic to describe things, activities, and principles that are very important or necessary, and on which others depend. 基本的

adjective [原级]最重要的,基本的;最简单的,初级的;(产品和服务)必需的;(化)碱性的;含碱的

Basic goods and services are very simple ones which every human being needs. You can also refer to people's basic needs for such goods and services.
基本必需的

noun [抽象名词]基本要素,基本原则

Water is a basic necessity of life.
水是一种基本生活必需品。

basic 出现在下面的课文中
Lesson 19 The stuff of dreams
Lesson21 Williams S. Hart and the early 'Western' film
Lesson 30 Exploring the sea-floor
Lesson 40 Waves
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