Statistically, one person buys about 8-10 masks (and buys them when they wear out), so that they can change during the day and wash them - comparable to the way we do with underwear.
ສະຖິຕິ, ຄົນ ຫນຶ່ງ ຊື້ ຫນ້າ ກາກປະມານ 8-10 ໃບ (ແລະຊື້ພວກມັນເມື່ອພວກເຂົານຸ່ງເສື້ອ), ເພື່ອໃຫ້ພວກເຂົາປ່ຽນແປງໃນເວລາກາງເວັນແລະລ້າງພວກມັນ - ປຽບທຽບກັບວິທີທີ່ພວກເຮົາເຮັດກັບຊຸດຊັ້ນໃນ.