最明显的改变是第13条肋骨的缺失或发育不全，及下游脊柱附加椎骨的出现。

The most obvious changes was a missing or rudimentary 13th rib and an additional vertebra in the lower backbone.

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最明显的改变是第13条肋骨的缺失或发育不全，及下游脊柱附加椎骨的出现。

The most obvious changes was a missing or rudimentary 13th rib and an additional vertebra in the lower backbone.

youdao