n (1)梯子(framework with rungs for climb-ing)[C]：put up/set up a～架起梯子;ascend/climb/go up/get up/mount a～爬上梯子;come down/descend a～從梯子上下來; steady a～穩(wěn)固梯子;lean/place/rest a～against a wall 把椅子靠在墻上;an aerial/accommodation～天/舷梯; a rope～ 繩梯;get one's foot on the～開始，著手;kick away(down)the～(by which one rose) 過河拆橋，忘恩負義;
(2)上升的途徑，階梯(means of rising)[C](fig)：Hard work is often a～to fame/success. 發(fā)奮工作常是通向成名/成功的階梯。
(3)等級(rising series of levels)[U，the～]：the bottom rung of the social～社會的最低層;
(4)跳絲(a long，narrow flaw caused by the breaking of a stitch in a stocking or other knitted fabric)[C](=AmE run)：get/have a～in a stocking 長筒襪跳了一根絲;
v(使)跳(抽)絲((cause) to develop a ladder(4))[T+n，I]：I've～ed my tights. 我的緊身衣抽絲了。Stockings～easily. 長筒襪很容易跳絲。