positive-negative forming theory 正负成形理论
negative pressure forming 负压成型
forming negative ions 负离子形成
forming negative pressure 形成负压
Non-spore forming Gram-negative rods 无芽孢革兰阴性杆菌
Disputes between parents, breakdown of a family and improper ways of education can lead to adolescents forming negative personalities and even committing an offence.
父母冲突、破碎家庭、教育方法不当以及家庭环境影响都会导致青少年形成不良个性，甚至走上犯罪的道路。
Uniaxial prestrain will obviously improve the forming limit on positive strain ratio zone, while it has little effect on negative strain ratio zone.
单拉预应变路径将显著提高正应变比区的成形极限，而对负应变比区的成形极限影响不大。
Equiaxial prestrain will obviously decrease the forming limit on positive strain ratio zone, while it slightly improves the forming limit on negative strain ratio zone.
等双拉预应变将明显降低正应变比区的成形极限，对负应变比区的成形极限有所提高。
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