Flexibility in the foot is the biggest recent advance in prostheses, but artificial legs still have no bend in the ankles.
假脚的灵活性是假肢目前最大的进步，然而假腿踝关节仍无法弯曲。
When necessary, need to bend a crescent, a turn, because it is too strong and easily broken, we need more flexibility, in order to overcome setbacks.
在必要时候需要弯一弯，转一转，因为太坚强容易折断，我们需要更多的柔软，才能战胜挫折。
Further, a catheter may be configured to have a cross sectional profile or a predefined flexibility along its entire length that causes the catheter to bend, curve or move in a predefined direction.
而且，导管可以配置为沿其整个长度具有截面轮廓或 预定的柔性，从而导致该导管在预定方向上弯曲、卷曲或移动。
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