retractable

adj.

可收回的；可撤消的；可缩回的；可缩进的

retractable roof可移动车顶

1. The house has a retractable staircase that lowers to the ground.
   这幢房子有一条缩回放到地面的楼梯。

Automatic retractable lancet assembly
Physical performance of a positron tomograph for brain imaging with retractable septa
Fully three-dimensional reconstruction for a PET camera with retractable septa
A Two㏒tage Molecular Retractable Cable Featuring Push〣utton and Rotary Two￤ay Switching Modes
Retractable-barb needle for breast lesion localization: use in 60 cases
Fuel savings for a general cargo ship employing retractable bow foils
Retractable television mounting
Sheath and retractable surgical tool combination
Combining multiple knowledge bases
Classical negation in logic pro-grams and deductive databases