4 sentences

1. 他们改了配方。

   tā​men gǎi le pèi​fāng.

   They changed the recipe.

   Source: OpenSubtitles

2. 这种新型涂料的配方非常环保。

   zhè zhǒng xīn​xíng tú​liào de pèi​fāng fēi​cháng huán​bǎo.

   The formula of this new type of paint is very environmentally friendly.

   Source: Dong Chinese Dictionary

3. 我正在寻找制作正宗川菜的配方。

   wǒ zhèng​zài xún​zhǎo zhì​zuò zhèng​zōng Chuān​cài de pèi​fāng.

   I am looking for a recipe for authentic Sichuan cuisine.

   Source: Dong Chinese Dictionary

4. 老师在课堂上讲解了如何通过配方来解一元二次方程。

   lǎo​shī zài kè​táng shàng jiǎng​jiě le rú​hé tōng​guò pèi​fāng lái jiě yī​yuán'èr​cì fāng​chéng.

   The teacher explained in class how to solve quadratic equations by completing the square.

   Source: Dong Chinese Dictionary