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difference; variation
difference
「差」 has another reading with different meanings.
二人の実力に差はほとんどないよ。
There's almost no difference in their abilities.
時差ぼけで眠くて仕方がないんだ。
I can't help being sleepy from jet lag.
価格の差を比較してみてくれる?
Can you compare the price difference?