4 sentences

1. 棕榈油是怎样炼成的？

   zōng​lǘ​yóu shì zěn​yàng liàn chéng de?

   How is Palm Oil made?

   Source: CCMatrix

2. 我爸爸是个炼钢工人。

   wǒ bà​ba shì ge liàn gāng gōng​rén.

   My father is a steelworker.

   Source: OpenSubtitles

3. 大家都喜欢炼乳。

   dà​jiā dōu xǐ​huan liàn​rǔ.

   Everybody likes condensed milk.

   Source: OpenSubtitles

4. 简而言之，这意味着人类已经开采和提炼黄金超过6600年了。

   jiǎn'ér​yán​zhī, zhè yì​wèi​zhe rén​lèi yǐ​jing kāi​cǎi hé tí​liàn huáng​jīn chāo guò6600 nián le.

   In short, this means that humans have been mining and refining gold for more than 6,600 years.

   Source: CCMatrix