5 sentences

1. 飞机飞行得很平稳。

   fēi​jī fēi​xíng de hěn píng​wěn.

   The plane is flying very steadily.

   Source: Dong Chinese Dictionary

2. 人造卫星正在预定的轨道上平稳运行。

   rén​zào wèi​xīng zhèng​zài yù​dìng de guǐ​dào shàng píng​wěn yùn​xíng.

   The satellite is orbiting smoothly on its predetermined path.

   Source: Dong Chinese Dictionary

3. 政府通过宏观调控来维持经济的平稳运行。

   zhèng​fǔ tōng​guò hóng​guān tiáo​kòng lái wéi​chí jīng​jì de píng​wěn yùn​xíng.

   The government maintains the steady operation of the economy through macro-control.

   Source: Dong Chinese Dictionary

4. 这架客机正在三万英尺的高空平稳地航行。

   zhè jià kè​jī zhèng​zài sān​wàn yīng​chǐ de gāo​kōng píng​wěn de háng​xíng.

   This passenger plane is cruising smoothly at an altitude of 30,000 feet.

   Source: Dong Chinese Dictionary

5. 这个方案旨在实现从旧系统到新系统的平稳过渡。

   zhè gè fāng'àn zhǐ​zài shí​xiàn cóng jiù xì​tǒng dào xīn xì​tǒng de píng​wěn guò​dù.

   This plan aims to achieve a smooth transition from the old system to the new one.

   Source: Dong Chinese Dictionary