3 sentences

1. 离发车时间还有十分钟。

   lí fā​chē shí​jiān hái yǒu shí fēn​zhōng.

   There are ten minutes left before the departure time.

   Source: Dong Chinese Dictionary

2. 这两趟班车的发车间隔是十五分钟。

   zhè liǎng tàng bān​chē de fā​chē jiàn​gé shì shí​wǔ fēn​zhōng.

   The departure interval for these two shuttle buses is fifteen minutes.

   Source: Dong Chinese Dictionary

3. 由于发生了技术故障，火车的发车时间不得不延迟。

   yóu​yú fā​shēng le jì​shù gù​zhàng, huǒ​chē de fā​chē shí​jiān bù​dé​bù yán​chí.

   The train's departure time had to be delayed due to a technical failure.

   Source: Dong Chinese Dictionary