2 sentences

1. 两艘航天器在预定轨道成功交会。

   liǎng sōu háng​tiān​qì zài yù​dìng guǐ​dào chéng​gōng jiāo​huì.

   The two spacecraft successfully rendezvoused in their predetermined orbit.

   Source: Dong Chinese Dictionary

2. 这种新型复合材料被广泛用于航天器的制造。

   zhè zhǒng xīn​xíng fù​hé cái​liào bèi guǎng​fàn yòng​yú háng​tiān​qì de zhì​zào.

   This new type of composite material is widely used in the manufacturing of spacecraft.

   Source: Dong Chinese Dictionary