“拱起”怎么读

“拱起”的英语可以翻译为：hunch-up ...

猫看见那只狗时拱起了背.The cat arched her back when she saw the dog.猫看到狗,便把背拱起.The cat arches its back when It'sees the dog.那猫看见狗时就拱起了背。The cat arched its back when it saw the dog....