情不自禁的英文：
[Literal Meaning]
feeling/not/oneself/restrain
not be able to restrain one's feelings

[解释]
感情激动，控制不住自己。

[Explanation]
to let oneself go

[例子]
看到电影里两个年轻人终于团圆了，观众们都情不自禁地鼓起掌来。

[Example]
Seeing the young couple was finally reunited, the audience could not help applauding.

[英文等价词]
cannot help oneself
get off at full score
in spite of oneself

Voluntary laughter
情不自禁的大笑

I dissolved into helpless laughter.
我情不自禁地笑起来

We spontaneously started to sing.
我们情不自禁地跳起舞来。

We cannot help but admire his courage.
我们情不自禁地钦佩他的勇气。

He felt an irresistible impulse to cry out at the sight.
他看到那景象,情不自禁想要大声叫喊。

Still by an irresistible impulse I curse myself with an awful penance,
我仍旧要情不自禁地悔恨得咬牙切齿，咒骂自己。

To save his life he could not repress a chuckle.
为了救他的命，他情不自禁地轻声笑起来。

An exclamation of joy escaped from her lips.
她情不自禁地发出了一声高兴的叫喊声。

After a long time of departure, when meeting each other once again, they are petting together automaticly.
经过了长久的分别，当再次重逢时，他们情不自禁的拥吻在一起。

Nixon carried away with it all, delivered his extemporaneous toast
尼克松对一切都很满意，颇有些情不自禁地发表了他的即席祝酒词。