The methods are: it must curve knees when you bend waist and touch toes with hands or collect object.
帮助的办法是：在弯腰用手接触脚趾或拾取物体的时候，一定要弯曲膝部。
2
'This will be slightly higher at the back than the front and will curve into your waist rather than sit straight up, ' she said.
“裤腰后部略高于前部，这样能顺着你的腰部曲线走，不会看起来像一条直线，”她这么说道。 。
3
The software developed in this paper mainly contains curve fitting of measuring data, Gaussian distribution estimation of curves, calculation of the size of facula, divergence angle and waist facula.