3 sentences

1. 这首曲子的节奏感非常正点。

   zhè shǒu qǔ​zi de jié​zòu​gǎn fēi​cháng zhèng​diǎn.

   The sense of rhythm in this piece is spot on.

   Source: Dong Chinese Dictionary

2. 收音机每逢正点都会播报新闻。

   shōu​yīn​jī měi féng zhèng​diǎn dōu huì bō​bào xīn​wén.

   The radio broadcasts the news on the hour every hour.

   Source: Dong Chinese Dictionary

3. 由于天气晴朗，航班正点起飞了。

   yóu​yú tiān​qì qíng​lǎng, háng​bān zhèng​diǎn qǐ​fēi le.

   Since the weather was clear, the flight took off on time.

   Source: Dong Chinese Dictionary