Her father's face had suddenly tightened as though he was being strangled by invisible hands.是什么意思？

Her father's face had suddenly tightened as though he was being strangled by invisible hands.

她父亲的脸突然僵硬了,仿佛是被无形的双手扼住了脖子。

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。

face

n. 面容，表面，脸，方面；vt.& vi. 面对，面向…，正视，承认；vt. （感到不能）对付，（明知不好办而）交谈，必须对付（某情况），面临…；

例句
Graham hit him across the face with the gun.
格雷厄姆用枪击打他的脸部。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

suddenly

adv. 意外地，忽然地，奄，勃，霍然；

例句
'It was incredible,' Kurt says, suddenly aglow.
“简直难以置信，”库尔特突然满面红光地说。

tightened

v. 收紧( tighten的过去式和过去分词 )，（使）变紧，（使）绷紧，加紧；

例句
...in 1987, when the government tightened fiscal policy.
在1987 年，当时政府紧缩财政政策

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

though

conj. 虽然，尽管，即使，纵然；adv. 可是，但是，不过，然而，话虽这样说；prep. 但；

例句
Sometimes, avoidance of one particular food will have this beneficial effect, though admittedly rarely.
有时，对某一食物的忌口能带来这种好处，尽管不可否认这种情况极为少见。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

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

being

n. 存在，生物，人，要素，本质；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

strangled

v. 扼死( strangle的过去式和过去分词 )，使窒息，抑制，压制；

例句
Her father's face had suddenly tightened as though he was being strangled by invisible hands.
她父亲的脸突然僵硬了,仿佛是被无形的双手扼住了脖子。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

invisible

adj. 看不见的，不易为视线所见的，隐匿的，无形的（指银行、旅游等服务），不引人注目的；n. 看不见的人；

例句
Patterns that are invisible on the ground can be the most striking part of an aerial photograph...
地面上看不出来的图案可能会成为航拍照片中最引人注目的东西。

hands

n. 手( hand的名词复数 )，人手，（工具等的）把，帮助；

例句
He lifted his hands above his head...
他将双手举过头顶。