柯林斯词典retractable /rɪˈtræktəbəl/ 1. ADJ A retractable part of a machine or a building can be moved inward or backward. 可縮進的; 伸縮自如的[usu ADJ n] A 20,000-seat arena with a retractable roof is planned. 一個可容納2萬名觀衆、帶伸縮頂棚的競技場正在槼劃中。 返回 retractable