[TOP]retractable re·tract·able / riˈtræktəbl / adjective that can be moved or pulled back into the main part of sth 可缩进的；可拉回的: a knife with a retractable blade 弹簧刀 [TOP]retractable re·tract·a·ble / rɪˈtræktəbl ; rɪˈtræktəbəl / adjective1. a retractable part of something can be pulled back into the main part 可收起的，可缩回的: a knife with a retractable blade 一把刀片可缩回的刀 [TOP]retractable
1.ADJ 形容词 可缩进的;可缩回的;可收回的 A retractable part of a machine or a building can be moved inwards or backwards.
【搭配模式】：usu ADJ n
A 20,000-seat arena with a retractable roof is planned. 一个有两万个座位、带可开合顶棚的体育场正在规划中。