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Gene therapies are another option: these might restore sickle-shaped cells to normal.

基因疗法是另一个选择：可以将镰刀形细胞修复，变成正常的细胞。

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Deinonychus, or "terrible claw" after the sickle-shaped talon on each hind foot, stood about 11 feet from head to tail and was a lithe predator.

这种被称为恐爪龙(Deinonychus)的恐龙后足上存在镰刀般的利爪，从头到尾的身长约为3.3米，是一种非常敏捷的掠食者。

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