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running fast; double time
cantering
doing things in a hurry
バスに乗り遅れそうでかけ足で停留所に向かった。
I was about to miss the bus, so I ran toward the bus stop.
秋が過ぎてかけ足で冬がやって来た。
Autumn passed and winter arrived in a hurry.
かけ足で日本史を振り返る講座が人気を集めた。
A course that quickly reviews Japanese history became popular.