4 sentences

1. 这只是工作上的分歧，并非私人恩怨。

   zhè zhǐ​shì gōng​zuò shàng de fēn​qí, bìng fēi sī​rén ēn​yuàn.

   This is just a disagreement at work, not a personal grudge.

   Source: Dong Chinese Dictionary

2. 双方在某些核心问题上仍存在严重的分歧。

   shuāng​fāng zài mǒu​xiē hé​xīn wèn​tí shàng réng cún​zài yán​zhòng de fēn​qí.

   The two sides still have serious disagreements on some core issues.

   Source: Dong Chinese Dictionary

3. 虽然存在分歧，但友好合作仍是两国关系的主流。

   suī​rán cún​zài fēn​qí, dàn yǒu​hǎo hé​zuò réng shì liǎng guó guān​xi de zhǔ​liú.

   Despite differences, friendly cooperation remains the mainstream of the relationship between the two countries.

   Source: Dong Chinese Dictionary

4. 该非线性方程在临界点产生了分歧。

   gāi fēi​xiàn​xìng fāng​chéng zài lín​jiè​diǎn chǎn​shēng le fēn​qí.

   The nonlinear equation bifurcates at the critical point.

   Source: Dong Chinese Dictionary