2 sentences

1. 请检查一下安全阀是否正常工作。

   qǐng jiǎn​chá yī​xià ān​quán fá shì​fǒu zhèng​cháng gōng​zuò.

   Please check if the safety valve is working properly.

   Source: Dong Chinese Dictionary

2. 这两个零件需要精确对准才能正常工作。

   zhè liǎng gè líng​jiàn xū​yào jīng​què duì​zhǔn cái néng zhèng​cháng gōng​zuò.

   These two parts need to be precisely aligned to function properly.

   Source: Dong Chinese Dictionary