She read the letter and promptly burst into tears.

她一看信眼泪就夺眶而出。

《牛津词典》

Another option: Use a motivational mantra that provides a meditation-like burst, or read or recite a poem that helps you focus.

另一个建议:使用一个有动机的咒语，这将会有一个沉思的爆炸，或者读或者朗诵一首诗帮助你集中。

youdao

When Jawaharlal Nehru read Buck’s captivating tale aloud to Mahatma Gandhi on his sick-bed, both men burst out laughing.

当贾瓦哈拉尔·尼赫鲁给病床上的圣雄甘地大声朗读赛珍珠有趣的故事时，两个人都哈哈大笑了。

youdao

Family members and fellow policemen burst into cheers and applause when the verdict was read out.

BBC: East Timor police chief acquitted

Once today after Petrocelli read a certain section of the government's indictments, Skilling burst out, that's absurd.

NPR: Enron Witnesses Lying About Fraud, Skilling Says