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单词 femtometer
释义
femtometer
(once / 5909656 pages)
n

WORD FAMILY
femtometer
USAGE EXAMPLES
Putting these techniques together gave an answer of about 0.8768 femtometer for the proton’s radius, just less than a quadrillionth of a meter.
New York Times(Jul 12, 2010)
The surprise was an answer that was 4 percent smaller, 0.84184 femtometer.
New York Times(Jul 12, 2010)
n a metric unit of length equal to one quadrillionth of a meter
Syn|Hyper
femtometre, fermi
metric linear unit
a linear unit of distance in metric terms
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