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surface; face
outside; exterior
appearances; superficiality
「表面」 has another reading with different meanings.
テーブルの表面をきれいに拭きました。
I wiped the surface of the table clean.
水の表面に葉っぱが浮いています。
Leaves are floating on the surface of the water.
この本の表面が汚れているね。
The surface of this book is dirty, isn't it?