弓部向外延伸有一第一端与一第二端，分别扣合在一接地轨道上。

The bow part is extended outward to form a first end and a second end which are buckled on a grounding rail respectively.

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目的对主动脉弓部病变杂交手术后常见并发症的发生原因进行分析。

Objective To analyze the reasons of complications after hybrid procedure in the treatment of aortic arch diseases.

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人们走路每迈出一步，重量落下时所输出的一部分能量，事实上被脚弓存储起来，然后被脚弓弹起，这部分能量就又返回到腿部。

Spring tendons enhance the foot’s efficiency: some of the energy spent to drop one’s weight down when taking a step is actually stored and then returned to the leg as it rebounds.

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