x So the mole fraction at any time is n minus x divided by the total number of moles, x which we just calculated as n plus x.

任何时候的摩尔分数是n减,除以总摩尔数，就是我们计算的n加。

youdao

The results show that high cross-linking degree of resin can be gained as the mass fraction of comonomer N-hydroxymethyl acrylamide (NMA)and hydroxyethacrylate (HEMA)are 6% and 15% respectively.

结果表明，当共聚单体N 羟甲基丙烯酰胺（NMA）和甲基丙烯酸羟乙酯（HEMA）的质量分数分别为6%和15%时， 树脂的交联度较高；

youdao

The mass fraction of n-butene in mixed C4 from catalytic cracking after etherized was approximately 40%.

混合c 4中含有质量分数约为40%的正丁烯，是生产丙烯的优质原料。

youdao

Never mind that the U.S. defense industrial base is a fraction of what it was in Eisenhower's day n terms of the number of domestic suppliers involved, the size of the associated workforce and output of materiel.

CENTERFORSECURITYPOLICY: Hu's becoming first?