2 sentences

1. 工人正在检查机器轴承上的锁键。

   gōng​rén zhèng​zài jiǎn​chá jī​qì zhóu​chéng shàng de suǒ jiàn.

   The worker is checking the locking key on the machine bearing.

   Source: Dong Chinese Dictionary

2. 这台机器的轴承由于磨损需要更换。

   zhè tái jī​qì de zhóu​chéng yóu​yú mó​sǔn xū​yào gēng​huàn.

   The machine's bearings need to be replaced due to wear and tear.

   Source: Dong Chinese Dictionary