ribless

例句：

1. 1. The statue was made from a block of marble that had been ribless for centuries.
   这座雕像是用一块已经没有肋骨的大理石制成的。
2. 2. The fish was ribless, making it easy to eat without bones.
   这条鱼没有肋骨，吃起来非常方便，没有骨头。
3. 3. The scientist discovered the ribless structure of the new species.
   这位科学家发现了这种新物种没有肋骨的结构。