(1)段階的な方法で
(2)in a gradual manner; "the snake moved gradually toward its victim"
さらに詳しく
(1)移動率（特に歩く場合か走る場合）
(2)the rate of moving (especially walking or running)
(1)足を上げ、次いでそれを下ろして位置を変える行為
(2)the act of changing location by raising the foot and setting it down; "he walked with unsteady steps"
