1 sentence

1. 二茂铁常在有机合成中作为添加剂使用。

   èr​mào​tiě cháng zài yǒu​jī hé​chéng zhōng zuò​wéi tiān​jiā​jì shǐ​yòng.

   Ferrocene is often used as an additive in organic synthesis.

   Source: Dong Chinese Dictionary