She shrank back with an involuntary gasp.是什么意思？

She shrank back with an involuntary gasp.

她不由得倒抽了口冷气，往后退了退。

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

shrank

v. 收缩( shrink的过去式 )，（使）缩水，退缩，畏缩；

例句
Siegfried cringed and shrank against the wall...
西格弗里德畏缩了，退避到墙根。

back

n. 背，背部，背面，反面，后面，后部，（椅子等的）靠

例句
He looked back at the abject, silent girl and repeated his question.
他转过头看着这个噤若寒蝉的女孩，又重复了一遍他的问题。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

例句
He started eating an apple...
他开始吃苹果。

involuntary

adj. 无意识做出的，非故意的，非自愿的，不随意的，不由自主的；

例句
Another surge of pain in my ankle caused me to give an involuntary shudder.
脚踝突然又一阵疼痛，痛得我直打哆嗦。

gasp

vi. 喘气，喘息，倒抽气，渴望；vt. 喘着气说出；n. 喘气，喘息；

例句
One could only gasp at the sheer effrontery of the man.
那人十足的厚颜无耻让人们吃惊得无话可说。