3 sentences

1. 晚上胃痛是什么原因？

   wǎn​shang wèi​tòng shì shén​me yuán​yīn?

   What causes stomach pain at night?

   Source: CCMatrix

2. 胃痛是食物中毒的常见症状。

   wèi​tòng shì shí​wù​zhòng​dú de cháng​jiàn zhèng​zhuàng.

   Stomach pain is a common symptom of food poisoning.

   Source: CCMatrix

3. 事实上，各种各样的因素都会导致进食蔬菜后的胃痛。

   shì​shí​shang, gè​zhǒng​gè​yàng de yīn​sù dōu huì dǎo​zhì jìn shí shū​cài hòu de wèi​tòng.

   In fact, a wide variety of factors can cause stomach pain after eating vegetables.

   Source: CCMatrix