Her throat constricted and she swallowed hard.是什么意思？

Her throat constricted and she swallowed hard.

她喉咙发紧，使劲地咽了一下唾沫。

her

pron. (she的宾格)她，(she的所有格)她的，她，指某个国家，（一艘）船；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

throat

n. 咽喉，颈前部，[植物学]管颈；vt. 用沙哑的声音或嗓音发音；

例句
My throat constricted, so that I had to concentrate on breathing.
我的嗓子发紧，所以我不得不把注意力集中在呼吸上。

constricted

v. 压缩，压紧，使收缩( constrict的过去式和过去分词)；

例句
Men and women alike have been constricted by traditional sexual roles.
男性和女性同样受到传统性别角色的束缚。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

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。

swallowed

vt.& vi. 吞，咽（swallow的过去式与过去分词形式）；

例句
She swallowed a mouthful of the hot strong brew, and wiped her eyes.
她喝了一口热浓茶，又擦了擦眼睛。

hard

adj. 困难的，硬的，有力的，努力的；adv. 努力地，猛力地，严重地，沉重地；n. 英〉硬海滩，登陆处；

例句
The team fought hard and gave a good account of themselves.
这支队伍奋力拼搏，表现出色。