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right in front; just opposite; under the nose
駅のまん前にコンビニがあるので便利だ。
There is a convenience store right in front of the station, so it is handy.
事故は学校のまん前で起きたため騒ぎになった。
The accident happened right in front of the school, causing a commotion.
舞台のまん前の席だったので表情がよく見えた。
I was in a seat right in front of the stage, so I could see the facial expressions well.