1 sentence

1. 他仔细检查了一下，发现这竟然是一张假钞。

   tā zǐ​xì jiǎn​chá le yī​xià, fā​xiàn zhè jìng​rán shì yī zhāng jiǎ​chāo.

   He examined it closely and discovered it was actually a counterfeit bill.

   Source: Dong Chinese Dictionary