单词：non-retractable
non-retractable的用法和样例：
例句
- Unlike that benignly daft creature, this real-life surgeonfish in Indonesia carries a sharp retractable blade of bone near the base of its tail.跟那只疯疯癫癫的亲切生物不同，印度尼西亚的这只正牌医生鱼在尾巴附近有一片能伸缩的锋利骨片。
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