开始保持膝部轻微弯曲并提起脚跟离开地板。

At first keep the knees slightly bent and the heels lifted away from the floor.

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当右腿已经滑至身后，把身体重量放在右腿上，弯曲膝盖，并提起脚跟。

When right leg is behind you, shift your weight onto it while bending right knee and lifting right heel.

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