3 sentences

1. 他把枪口对准了靶子。

   tā bǎ qiāng​kǒu duì​zhǔn le bǎ​zi.

   He aimed the gun at the target.

   Source: Dong Chinese Dictionary

2. 请把镜头对准那朵花，我要拍张照片。

   qǐng bǎ jìng​tóu duì​zhǔn nà duǒ huā, wǒ yào pāi zhāng zhào​piàn.

   Please aim the camera at that flower; I want to take a photo.

   Source: Dong Chinese Dictionary

3. 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