... Nanometre毫微米 Picometre微微米 micron微米 ...
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同义词: picometer micromicron
以上来源于: WordNet
To do this the spacecraft will need fantastically accurate control systems: they will have to measure changes in the positions of the satellites with a precision of 20 picometres (a picometre is a millionth of a micron).
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