The main axis of a compound leaf.

叶轴是复叶的主轴。

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The main direction of the vessels was parallel with the long axis of the teeth.

其主要的血管走行方向为与牙齿长轴平行。

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The main direction of the vessels was parallel with the long axis of the teeth.

其主要的血管走行方向为与牙齿长轴平行。

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