必需

• 拼音: bì xū
• 汉字拆解: 必 = heart with a dot, certainty; 需 = 雨 (rain) + 而 (and), originally meaning to wait for rain

含义

Essential; indispensable; must have. Things that are absolutely necessary.

Often confused with 必须 (must do). 必需 emphasizes that something is a necessity or essential item (必需品 necessities), while 必须 emphasizes obligatory action. Can function as verb or adjective.

例句

1. 水是人体必需的物质，每天要喝够量。
2. 出门旅行，护照和钱是必需的东西。
3. 维生素C是人体必需的营养素之一。

用法指南

语境: necessities, requirements, health

语气: matter-of-fact

正确说法

• 这是生活必需品。(These are daily necessities.)
• 蛋白质是人体必需的。(Protein is essential for the body.)

错误说法

• 把'必需'和'必须'混淆——必需是形容词/名词，指必要的东西；必须是副词/助动词，指必须做某事 (Don't confuse 必需 with 必须 — 必需 describes essential things; 必须 means 'must do')

起源与历史

Compound of 必 (certainly/must) + 需 (need), meaning things that are certainly needed.

文化背景

世代: All ages

社会背景: Universal