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running fast; double time
cantering
doing things in a hurry
雨が降り出したので駈足で屋根の下に入った。
It started raining, so I ran under a roof.
駈足で回ったため展示をじっくり見られなかった。
Because I rushed through, I could not look at the exhibits carefully.
時間がないので駈足で要点だけお伝えします。
Since we are short on time, I will quickly cover only the key points.