Slot your foot (big toe up, pinky toe down) into the crack up to the arch of your foot, keeping your knee out to the side.
把你的脚尖（大脚趾在上，小指在下）楔入裂缝中去，直到你的足弓的部分，膝盖保持向外。
2
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses were given out.
给出了高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
3
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses have been presented.