2 sentences for 大便 (dà​biàn)

1. 医生问他今天有没有大便。

   yī​shēng wèn tā jīn​tiān yǒu​méi​yǒu dà​biàn.

   The doctor asked him if he had a bowel movement today.

   Source: Dong Chinese Dictionary

2. 他把大便样本交给了护士。

   tā bǎ dà​biàn yàng​běn jiāo​gěi le hù​shi.

   He handed the stool sample to the nurse.

   Source: Dong Chinese Dictionary