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10 Cards in this Set

  • Front
  • Back
gauze mask
口罩
(motorcycle, horse) rider
騎士
means, tool, instrument
工具
crowded
擁擠
full of, permeated with
充滿
exhaust fume
廢氣
smog; smoke; cigarette
to purify
淨化
to filter
過濾
function
作用