Examples of using "思わず笑ってしまった。" in a sentence and their english translations:
I laughed in spite of myself.
The president laughed in spite of himself.
I couldn't help laughing at his haircut.
I could not help laughing at his jokes.
He could not help laughing at her jokes.
- I laughed in spite of myself.
- I couldn't help laughing.
I couldn't help laughing at his haircut.