动词过去式:unrolled 过去分词:unrolled 现在分词:unrolling 第三人称单数:unrolls
un-=the reversal of an action 置于动词前，表示这个动词的相反的动作
v [I, Tn] (cause sth to) open out from a rolled position by rolling （使某物）（由卷曲状态）展开
*unroll a carpet, map, sleeping-bag 把卷着的地毯、地图、睡袋展开. Cf 参看 roll2 3.
v [I and T]
to open something that was in the shape of a ball or tube, and make it flat, or to become open in this way
He unrolled the carpet.