例句與造句

1. The polyacrylonitrile have no use to improve the homogeneity of concrete . the homogeneity of concrete have bad effect to compression strength , but the effect to chloride ion coefficient of diffusion is not obvious . for concrete used generality , if it ’ s homogeneity is acceptable ( k 7 % ) , the percentage of lost of the compression strength will lower than 10 %
   勻質(zhì)性對抗壓強(qiáng)度的影響較大,對氯離子滲透系數(shù)的影響不明顯,對于一般用途的混凝土,勻質(zhì)性良好( k 4 % )時,強(qiáng)度損失在5 %以內(nèi),勻質(zhì)性合格( k 7 % )時,強(qiáng)度損失在10 %以內(nèi);對于深層澆注的混凝土,離析度k 3 %時上下層強(qiáng)度的差異率才能保證在5 %以內(nèi)。
2. It's difficult to find coefficient of diffusion in a sentence. 用coefficient of diffusion造句挺難的