Interior floor dust is found to be

Interior floor dust is found to be one of the major pathways of childhood exposure to indoor
air pollutants

ผลลัพธ์ (ม้ง) 1:

Tha xim sab hauv pem teb plua plav nyob tau ib lub loj txoj thaum yau raug rau sab hauv tsev
pa ya kuab paug