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科學上測量原子的單位 来自维基百科,自由的百科全书
皮米(符号 pm,英式英语:picometre、美式英语:picometer)是长度单位,1皮米相当于1米的一兆(即一万亿)分之一,即10-12米。有时在原子物理学中称为微微米(micromicron)。
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