2 sentences for 填充 (tián​chōng — fill up)

1. 氦气常被用来填充气球。

   hài qì cháng bèi yòng​lái tián​chōng qì​qiú.

   Helium is often used to fill balloons.

   Source: Dong Chinese Dictionary

2. 枕头里填充了柔软的羽绒。

   zhěn​tou lǐ tián​chōng le róu​ruǎn de yǔ​róng.

   The pillow is filled with soft down.

   Source: Dong Chinese Dictionary