1 sentence for 不自然 (bù​zì​rán — artificial)

1. 他意识到他的声音听起来沙哑而不自然。

   tā yì​shi dào tā de shēng​yīn tīng qi​lai shā​yǎ ér bù​zì​rán.

   He realized that his voice sounded hoarse and unnatural.

   Source: CCMatrix