4 sentences

1. 你救了航天飞机。

   nǐ jiù le háng​tiān fēi​jī.

   You saved the shuttle.

   Source: OpenSubtitles

2. 中国的航天技术处于世界领先地位。

   Zhōng​guó de háng​tiān jì​shù chǔ​yú shì​jiè lǐng​xiān dì​wèi.

   China's aerospace technology is in a leading position in the world.

   Source: Dong Chinese Dictionary

3. 他一生都钟情于航天事业，并为此不懈努力。

   tā yī​shēng dōu zhōng​qíng yú háng​tiān shì​yè, bìng wèi cǐ bù​xiè nǔ​lì.

   He was devoted to the cause of aerospace throughout his life and worked tirelessly toward it.

   Source: Dong Chinese Dictionary

4. 计算机仿真技术在航空航天领域得到了广泛应用。

   jì​suàn​jī fǎng​zhēn jì​shù zài háng​kōng háng​tiān lǐng​yù dé​dào le guǎng​fàn yìng​yòng.

   Computer simulation technology is widely used in the field of aerospace.

   Source: Dong Chinese Dictionary