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one-by-one; separately
every single; each and every; without omission; fully; in detail
一々細かく指示しないで。
Don't give instructions about every little thing.
一々説明しなくても分かるだろう。
You should understand without me explaining every detail.
彼の言うことを一々気にしていたら疲れるよ。
You'll wear yourself out if you worry about everything he says.