back arch

Hey! Come back here with my arch enemy!

嗨! 同我的敌人一起过来吧!

Palmerston then came face to face with arch enemy Larry, the Downing Street cat, and the pair had a small stand-off before he wandered back home.

然后，帕默斯顿就与号称唐宁街首席捕鼠官的死敌拉里狭路相逢了。在他晃悠回家之前，两只喵还小小对峙了一会儿。

Don't arch your back, keep your spine straight.

别佝着背，把腰挺直。

Construction technique of back pouring of tie rod arch bridge arch rib steel pipe concrete

钢管混凝土系杆拱桥拱肋混凝土倒注施工技术

Application of Genetic Algorithms to the Back Analysis of Thermal Parameters in Arch Dam

遗传算法在拱坝热学参数反演分析中的应用

Relationship between treating cervical headache by loosening pillow back tendinous arch and serum C reactive protein

枕后腱弓松解治疗颈源性头痛及与血清C反应蛋白的关系

Back: Arch your back up and away from the floor.

背: 让背部离开地面,抬起.

If it's back toward the arch, you could have problems with support and stability.

如果是在后面的足弓部分弯曲，你可能会有支撑和稳定性方面的问题。