They can help people clean dirt, dust and hair easily.

它们可以帮助人们很容易地清洁脏东西、灰尘和头发。

youdao

Clean dirt (rust, grease etc.) in surface of work-piece with remover.

用清洗剂将被检工作表面的污物(锈，油脂等)清洗干净。

youdao

Within the pores to deep clean dirt, wash the skin texture complete, remove the old dead skin cells.

能深层净化毛孔内顽垢，完整洗净肌肤纹理，去除老废角质。

youdao

Remove dirt from the wound and press on it with a clean cloth or piece of clothing.

VOA: special.2009.08.11

President LUIZ INACIO LULA DA SILVA (Brazil): (Through translator) My mother, who was poor, would make me and my brother lift up the sofa so she could clean the dirt that no one saw - just like my government - we expose the dirt that had been pushed under the rug and we never stopped an investigation.

NPR: Corruption Claims Cloud Brazil's Presidential Election

Part of the benefit, everyone agrees, is that there are huge benefits to not being dirt-poor: clean drinking water, good medical care and safe housing, to name a few.

FORBES

More fascinating, less dirty - Dyson now engineers motors in a room so clean no pollutants, pollen or dirt can damage the finely tuned technology being made by the highly calibrated production line.

BBC: Technology