Description: 一納米是一米的十億分之一。它的符號是 nm。一根人類頭髮的寬度與一張紙的厚度差不多約，為 80,000-100,000 納米。人類 DNA 鍊的直徑約為 2.5 納米。一個水分子的直徑不到 1 納米。可見光的波長可以納米為單位測量。通常情況下，人眼可以檢測到波長在 380 納米（紫光）到 750 納米（紅光）之間的光。

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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