He developed a nervous twitch and began to blink constantly.是什么意思？

He developed a nervous twitch and began to blink constantly.

他身体出现了神经性抽搐，开始不停地眨眼睛。

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。

developed

adj. 先进的，发达的（国家或地区）；

例句
He had developed a slight American accent.
他说话带上了一点轻微的美国口音。

nervous

adj. 焦虑的，紧张不安的，神经质的；

例句
He's taking a dangerous drug: it acts very fast on the central nervous system...
他正在服用一种危险的药物：这种药物能很快影响到中枢神经系统。

twitch

vt.& vi. （使）抽动，（使）颤动，猛拉，（使）发生剧痛；n. 痉挛，抽筋，猛拉，猛抽，马勒；

例句
He developed a nervous twitch and began to blink constantly.
他身体出现了神经性抽搐，开始不停地眨眼睛。

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。

began

v. 开始( begin的过去式 )，着手，创始，创办；

例句
He began comically ad-libbing a script...
他即兴调侃起了一段剧本。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

blink

vt.& vi. 眨眼睛；vi. 闪亮，闪烁；n. 眨眼，一瞬间，闪亮，闪烁；

例句
It was all over in the blink of an eye.
转眼之间，一切都结束了。

constantly

adv. 不断地，时常地，始终，一直；

例句
Her dedication constantly astonishes me.
她的奉献精神总是让我震惊。