孩子们正在后院玩跳背游戏和翻筋头。
The kids were playing leapfrog and doing somersaults in the backyard.
爬台阶有助于提升和收紧臀肌、股四头肌，以及腿筋。
Steps work wonders for lifting and tightening the gluteal muscles, quadriceps, calves, and hamstrings.
言词在风中奇特地翻筋头。
冷身5分钟，拉伸小腿肌肉，腿筋和股四头肌，结束。
Finish with 5 minutes of cooldown stretching of the calf muscles, hamstrings, and quads.
技能断筋现在头有一个级别并且不再造成伤害。
Hamstring now only has one rank and no longer causes damage.
半橡筋腰头加绳带作松紧的调节。
翻跟头，空翻不使用特殊器械而进行的体操活动，如筋头、旋转和前手翻腾跃。
Gymnastics, such as somersaults, rolls, and handsprings, performed without the use of specialized apparatus.
介绍了以封头对称轴为中心沿径向设置立筋制作瓜瓣封头压制模具的过程。
The method of establishing radial support steel bars based on the symmetry axis of heads to manufacture the melon petal dies was presented.
此文介绍了连续挤压内凸筋口琴管模具的设计方法及其模具芯头的冷挤压加工。
This paper is about die tongue making: the design method and cold-press formation.
加筋平盖封头比普通平盖封头具有较好的受力性能，这对较厚平盖封头的结构改进设计有重要的指导作用。
The result shows that head with ribs is much better than the common one when they suffered the same pressure, and this gives us important guiding effect in the design of flat head.
加筋平盖封头比普通平盖封头具有较好的受力性能，这对较厚平盖封头的结构改进设计有重要的指导作用。
The result shows that head with ribs is much better than the common one when they suffered the same pressure, and this gives us important guiding effect in the design of flat head.
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