retractableadj.
英 rɪ'træktəbl | 美 rɪ'træktəbl
中文adj. 可取消的，可缩回的；伸缩自如的
词根词源
retractable (adj.)"capable of being drawn in," 1769; see retract + -able. Meaning "capable of being disowned" is recorded from 1610s. Also sometimes spelled retractible.
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