4 sentences

1. 校对发现文稿中夺了两个字。

   jiào​duì fā​xiàn wén​gǎo zhōng duó le liǎng gè zì.

   The proofreader found that two words were missing from the manuscript.

   Source: Dong Chinese Dictionary

2. 这个小错误在校对时被遗漏了。

   zhè gè xiǎo cuò​wù zài jiào​duì shí bèi yí​lòu le.

   This small mistake was overlooked during proofreading.

   Source: Dong Chinese Dictionary

3. 编辑部终于完成了校对，正式向印刷厂发稿。

   biān​jí​bù zhōng​yú wán​chéng le jiào​duì, zhèng​shì xiàng yìn​shuā​chǎng fā​gǎo.

   The editorial department finally finished proofreading and officially sent the manuscript to the printing plant.

   Source: Dong Chinese Dictionary

4. 这篇文章的排版小样已经出来了，你再校对一遍。

   zhè piān wén​zhāng de pái​bǎn xiǎo​yàng yǐ​jīng chū​lái le, nǐ zài jiào​duì yī biàn.

   The layout proof for this article is ready; please proofread it one more time.

   Source: Dong Chinese Dictionary