Crosby, P., "Quality is Free: The Art of Making Quality Certain", McGraw-Hill, 1979.
《自由的质量管理：确保质量的艺术》，McGraw - Hill出版，1979。
Results:In the group with intraperitoneal injection, the average lung tumor nodes in the group carrying NS gene were significantly lower than those of NS gene free mice( P< 0.01).
结果诱发携带NS基因组小鼠肺瘤结节平均数显著少于未携带NS基因组（P＜0．01）。
Wave propagation properties for P-SV wave in a free-fixed infinite plate in the state of plane strain problem were investigated.
针对平面应变弹性波动问题，研究了自由-固定边界无限大弹性板中P -SV波的传播特性。
During her "free" period from 2 to 3 p. m., Mrs. Cox has to meet with parents, order supplies, make out examinations, check assignments, and take care of many other things.
下午2点到3点是她的“空闲”时间，她在这段时间里会见家长，定购教学用品，出考试题，批改作业，还要料理许多杂事。
No differences were observed in the muscle total free amino acid (TFAA) and biogenic precursor contents among all groups of grass carp (P>0.05).
草鱼肌肉总游离氨基酸及生物胺前体含量各组间无显著差异（P>0.05）；
Pain-free rate of the study group was significantly higher than that of the control group(P <0.01) .
研究组术后各时点无痛率明显高于对照组（P<0.01）。
The expression of BC2 in the patients with recurrence or metastasis was higher than that in the tumor-free survivors (P<0.05).
BC2手术后表达降低，且复发转移组表达高于无瘤生存组（P<0.05）。
The expression of BC2 in the patients with recurrence or metastasis was higher than that in the tumor-free survivors (P<0.05).
BC2手术后表达降低，且复发转移组表达高于无瘤生存组（P<0.05）。
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