4 sentences for 孔 (kǒng — hole)

1. 他在纸上钻了一个孔。

   tā zài zhǐ shàng zuān le yī gè kǒng.

   He punched a hole in the paper.

   Source: Dong Chinese Dictionary

2. 木工在木板上钻了一个圆孔。

   mù​gōng zài mù​bǎn shàng zuān le yī gè yuán kǒng.

   The carpenter drilled a round hole in the wooden board.

   Source: Dong Chinese Dictionary

3. 他用一把小锥子在皮带上扎了个孔。

   tā yòng yī bǎ xiǎo zhuī​zi zài pí​dài shàng zhā le gè kǒng.

   He used a small awl to poke a hole in the belt.

   Source: Dong Chinese Dictionary

4. 由于光线突然变暗，他的瞳孔不由自主地放大了。

   yóu​yú guāng​xiàn tū​rán biàn àn, tā de tóng kǒng bù​yóu​zì​zhǔ dì fàng​dà le.

   His pupils dilated involuntarily as the light suddenly dimmed.

   Source: Dong Chinese Dictionary