4 sentences for 主 (zhǔ — owner)

1. 磷在硅中充当施主杂质。

   lín zài guī zhōng chōng​dāng shī zhǔ zá​zhì.

   Phosphorus acts as a donor impurity in silicon.

   Source: Dong Chinese Dictionary

2. 主宾已经在酒席的正位上坐好了。

   zhǔ bīn yǐ​jīng zài jiǔ​xí de zhèng​wèi shàng zuò​hǎo le.

   The guest of honor is already seated in the seat of honor at the banquet.

   Source: Dong Chinese Dictionary

3. 千万不要把“一步登天”误写成“一步登主”。

   qiān​wàn bù yào bǎ“ yī​bù​dēng​tiān” wù xiě​chéng“ yī bù dēng zhǔ”.

   Never mistake "一步登天" (reaching heaven in a single bound) for "一步登主".

   Source: Dong Chinese Dictionary

4. 他是主，我是客，哪有让客人动手干活的道理？

   tā shì zhǔ, wǒ shì kè, nǎ yǒu ràng kè​rén dòng​shǒu gàn​huó de dào​li?

   He is the host and I am the guest; it wouldn't be right to make a guest do the manual labor.

   Source: Dong Chinese Dictionary