犬运步时，背线保持紧张和水平。

While the dog is gaiting , the topline remains firm and level.

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是背线的自然延伸。

The tail is a natural extension of the topline.

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背线直且平。

Topline straight and level.

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背线水平。

The topline is level.

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结论X线胸片检查对直背综合征的检查有重要意义。

Conclusions the X-ray film exam is an important method for straight back syndrome.

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结论X线胸片检查对直背综合征的检查有重要意义。

Conclusions the X-ray film exam is an important method for straight back syndrome.

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