こんなことばしってる？

• 垢

  dirt

• 歯垢除去

  plaque removal

• 歯石除去

  scaling

• 溜まる（垢が〜/汚れが〜）

  to be covered with (grime/dirt) ; to have grime/dirt in -

• 不潔行為

  nasty conduct ; unclean acts