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用“fractions”造句大全，fractions造句

2018-10-22
Molefractionsorratio,butit'sgotunits.yBSointhegasphase,we'vegotmolefractionsyAandyB.Erodiblesoilfractionsareusuallydislodgedfromprojectionsandtrappedindepression.Thistrickcansaveyoumicrosecondsorfra...