埃格斯特朗
埃係中文細數，表示10⁻¹⁰，而且咁啱同洋文同名單位埃（Ångström）撞名。
中文埃表示10⁻¹⁰，而今少人用；洋文埃係長度單位，通常用來度原子半徑、化學鍵長同可見光波長。1埃等如10⁻¹⁰公尺，或0.1納米。
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