1 sentence

1. 苯环上的氢原子可以发生取代反应。

   běn​huán shàng de qīng​yuán​zǐ kě​yǐ fā​shēng qǔ​dài fǎn​yìng.

   Hydrogen atoms on the benzene ring can undergo substitution reactions.

   Source: Dong Chinese Dictionary