Chī huài dùzi, dé le jíxìng chángwèiyán.
I ate something bad and got acute gastroenteritis.
Yīshēng shuō zhè shì bìngdúxìng chángwèiyán.
The doctor said it's viral gastroenteritis.
Chángwèiyán zhǔyào zhèngzhuàng shì fùxiè hé ǒutù.
The main symptoms of gastroenteritis are diarrhea and vomiting.
