柯林斯词典retractable /rɪˈtræktəbəl/ 1. ADJ A retractable part of a machine or a building can be moved inward or backward. 可缩进的; 伸缩自如的[usu ADJ n] A 20,000-seat arena with a retractable roof is planned. 一个可容纳2万名观众、带伸缩顶棚的竞技场正在规划中。 返回 retractable