back arch

• 拱背,内衬拱,八字砖

back arch的用法和样例：

例句

1. When the animals were roused, there was a paroxysmal cough with the back arched.
   动物们惊起时，则有发作性咳嗽和拱背。
2. Thereafter, slow and expiratory, at the same time arch back carries genu hits the specified number with genu.
   尔后，缓慢呼气，同时拱背抬膝以膝触额。