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用“trillionth”造句大全，trillionth造句

用“trillionth”造句大全，trillionth造句

2016-10-29
Itwasfoundinconcentrationsof29to850picogrammespercubicmetreofair.Amicrogrammeisonetrillionthofagramme.TheX-raypulseshaveashutterspeedoflessthan100femtoseconds(100femtoseconds=1/10ofatrillionthofasecon...