断口主要分为塑性屈服变形区和弹性变形区两部分。
Fracture surface consists of plastic yield deformation area and elastic deformation area.
计算表明，注蒸汽稠油井如果用常规方法固井，在通常的注汽温度下，套管都因热应力而产生屈服变形。
Casing is heated by steam in thermal recovery Wells. There are thermal stresses in casing. Casing deforms when stresses exceed yield point.
波伊尔女士在她苏格兰的家中称，尽管受到很多关注，她并没有屈服于压力去彻底改变形象。
Speaking from her home in Scotland, Ms Boyle said that despite the attention, she hasn't succumbed to pressure to radically change her appearance.
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